I noticed that the latest menuconf.tab file in PakBritain does not have a button for the recently introduced marker list, so I have modified the file (based on the latest version of Pak128) to add that button. The modified version is here:
# menuconf.tab
#
# Menu configuration for Simutrans
#
# author: Markus Pristovsek
#
# changes for pak128: FrankP, VS
#
# With these file, each menu/tool/toolbar can be ****igned a meaning
# there are four different kind of tools
# general_tools: like query, remove, alter land, ...
# click tools: pause, fast forward, ...
# dialoge tools: open a dialoge like minimap, settings, finances, ...
# toolbar tools: open toolbars like slope tools, road tools, ...
icon_width = 32
icon_height = 32
# FIRST SECTION: general tools
# these tools have an icon, a cursor, and maybe a sound
# each entry has the form: general_tool[i],a,b,c,k
# i is the tool number (as seen below)
# a is the icon as number in menu: menu.GeneralTools.pak
# b is the cursor as number in cursor: cursor.GeneralTools.pak
# c is the sound on success
# k is the key to toggle this
# ommitting a parameter will set default values (i.e. no image, no sound, no default string)
# These are the default definition.
#
# currently define values for i
# WKZ_ABFRAGE = 0
# WKZ_REMOVER = 1
# WKZ_RAISE_LAND = 2
# WKZ_LOWER_LAND = 3
# WKZ_SETSLOPE = 4
# WKZ_RESTORESLOPE = 5
# WKZ_MARKER = 6
# WKZ_CLEAR_RESERVATION = 7
# WKZ_TRANSFORMER = 8
# WKZ_ADD_CITY = 9
# WKZ_CHANGE_CITY_SIZE = 10
# WKZ_PLANT_TREE = 11
# WKZ_FAHRPLAN_ADD = 12 // only for internal use
# WKZ_FAHRPLAN_INS = 13 // only for internal use
# WKZ_WEGEBAU = 14 // parameter either string with name of number for default way
# WKZ_BRUECKENBAU = 15
# WKZ_TUNNELBAU = 16
# WKZ_WAYREMOVER = 17
# WKZ_WAYOBJ = 18
# WKZ_STATION = 19
# WKZ_ROADSIGN = 20
# WKZ_DEPOT = 21
# WKZ_BUILD_HAUS = 22
# WKZ_LAND_CHAIN = 23
# WKZ_CITY_CHAIN = 24
# WKZ_BUILD_FACTORY = 25
# WKZ_LINK_FACTORY = 26
# WKZ_HEADQUARTER = 27
# WKZ_LOCK_GAME = 28
# WKZ_ADD_CITYCAR = 29
# WKZ_FOREST = 30
# WKZ_STOP_MOVER = 31
# WKZ_MAKE_STOP_PUBLIC = 32
#
general_tool[0]=0,0,9,a
general_tool[1]=1,1,14,r
general_tool[2]=2,2,11,u
general_tool[3]=3,3,11,d
# general tool 4 needs a parameter => icon defined in toolbar but no cursor yet
general_tool[4]=,4,11
general_tool[5]=4,4,11
general_tool[6]=5,5,9,M
general_tool[7]=6,6,,b
general_tool[8]=7,7,11,g
general_tool[9]=8,8,11,C
# general tool 10 needs a parameter + icon & cursor depends on it => not defined here
general_tool[11]=9,9,9,�
# define the cursor for schedule tools
general_tool[12]=,10
general_tool[13]=,10
general_tool[14]=,,11
general_tool[15]=,,12
general_tool[16]=,,9
general_tool[17]=,1,11
general_tool[18]=,,11
general_tool[19]=,,11
general_tool[20]=,,11
general_tool[21]=,,11
general_tool[22]=,12,11
general_tool[23]=,12,11
general_tool[24]=,12,11
general_tool[25]=,12,11
# we do not use general tool 23...25 directly => undefined icons
general_tool[26]=10,11,,
general_tool[27]=11,12,,h
general_tool[28]=12,7,,
# citycars are usually added via a dialoge
general_tool[30]=13,9,,
general_tool[31]=14,11,,
# SECOND SECTION: simple tools
# since these tools act immeadiately
# they have only an icon ****igned
# each entry has the form: dialoge_tool[i]=a,k
# i is the tool number (as seen below)
# a is the icon as number in menu: menu.SimpleTools.pak
# k is the key to toggle this
#
# WKZ_PAUSE = 0
# WKZ_FASTFORWARD = 1
# WKZ_SCREENSHOT = 2
# WKZ_INCREASE_INDUSTRY=3
# WKZ_UNDO=4
# WKZ_SWITCH_PLAYER=5
# WKZ_STEP_YEAR=6
# WKZ_CHANGE_GAME_SPEED=7
# WKZ_ZOOM_IN=8
# WKZ_ZOOM_OUT=9
# WKZ_SHOW_COVERAGE=10
# WKZ_SHOW_NAMES=11
# WKZ_SHOW_GRID=12
# WKZ_SHOW_TREES=13
# WKZ_SHOW_HOUSES=14
# WKZ_SHOW_UNDERGROUND=15
# WKZ_ROTATE90=16
# WKZ_QUIT=17
# WKZ_FILL_TREES=18
# WKZ_DAYNIGHT_LEVEL=19
#
simple_tool[0]=0,p
simple_tool[1]=1,W
simple_tool[2]=2,c
simple_tool[3]=3
simple_tool[4]=4,z
simple_tool[5]=5,P
simple_tool[6]=6
# simple tool 7 needs a parameter
simple_tool[8]=7,>
simple_tool[9]=8,<
# lots of icons still not drawn ...
simple_tool[10]=,v
simple_tool[11]=,!
simple_tool[12]=,#
simple_tool[13]=,%
simple_tool[14]=,"
simple_tool[15]=,U
simple_tool[16]=4,R
simple_tool[17]=,X
# THIRD SECTION: dialoge tools
# since these tools immeadiately open only a dialoge,
# they have only an icon ****igned
# each entry has the form: dialoge_tool[i]=a,k
# i is the tool number (as seen below)
# a is the icon as number in menu: menu.DialogeTools.pak
# k is the key to toggle this
#
# WKZ_HELP=0
# WKZ_OPTIONEN=1
# WKZ_MINIMAP=2
# WKZ_LINEOVERVIEW=3
# WKZ_MESSAGE=4
# WKZ_FINANCES=5
# WKZ_PLAYERS=6
# WKZ_DISPLAYOPTIONS=7
# WKZ_SOUND=8
# WKZ_LANGUAGE=9
# WKZ_PLAYERCOLOR=10
# WKZ_JUMP=11
# WKZ_LOAD=12
# WKZ_SAVE=13
# WKZ_LIST_HALT=14
# WKZ_LIST_CONVOI=15
# WKZ_LIST_TOWN=16
# WKZ_LIST_GOODS=17
# WKZ_LIST_FACTORY=18
# WKZ_LIST_CURIOSITY=19
# WKZ_EDIT_FACTORY=20
# WKZ_EDIT_ATTRACTION=21
# WKZ_EDIT_HOUSE=22
# WKZ_EDIT_TREE=23
# WKZ_ENLARGE_MAP=24
# WKZ_LIST_LABEL=25
#
dialog_tool[0]=0,?
dialog_tool[1]=1,Q
dialog_tool[2]=2,m
dialog_tool[3]=3,w
dialog_tool[4]=4,B
dialog_tool[5]=5,f
dialog_tool[6]=6,k
dialog_tool[7]=7
dialog_tool[8]=8
dialog_tool[9]=9
dialog_tool[10]=10
dialog_tool[11]=11,J
dialog_tool[12]=12,L
dialog_tool[13]=13,S
dialog_tool[14]=14,H
dialog_tool[15]=15,V
dialog_tool[16]=16,T
dialog_tool[17]=17,G
dialog_tool[18]=18,F
dialog_tool[19]=19,A
dialog_tool[20]=21
dialog_tool[21]=22
dialog_tool[22]=23
dialog_tool[23]=24
dialog_tool[24]=25
dialog_tool[25]=20,
# FINAL SECTION: compose all tool bars
# now the defintion of all tool bars
# in general only toolbar[0] is needed, which is the main menu
# all other toolbars are derived from it
# Each entry is a[i],b,k,c,d
# a[i] is either: general_tool[i], simple_tool[i], dialog_tool[i], toolbar[i], -, ways(waytype), signs(waytype), wayobj(waytype), stops(utype), depots(waytype)
# b could be a different icon from the previous (if any) tool definition taken from menu.ToolbarTools.pak
# k could be a different key binding
# c is the default parameter
# d is the helpfile name (only if a is toolbar[i])
#
# Entry without an icon will not be shown. Use - for seperator.
#
# following waytypes are defined (for nearly everything)
# road_wt = 1
# track_wt = 2
# water_wt = 3
# monorail_wt = 5
# maglev_wt = 6
# tram_wt = 7
# narrowgauge_wt = 8
# air_wt = 16
# powerline_wt = 128
#
# subtypes for ways(x,#)
# flat = 0
# elevated/runway = 1
# tram = 7 (only for track)
# special (eg. fence) = 255
#
# following buildingstype are defined (for buildings(#))
# unbekannt = 0
# attraction_city = 1
# attraction_land = 2
# denkmal = 3
# fabrik = 4
# rathaus = 5
# weitere = 6
# firmensitz = 7
# hafen = 11
# the following are in the form x,y with y= waytype (0 for none)
# depot = 33
# generic_stop = 34
# generic_extension = 35
#
#
# IMPORTANT: toolbar[2] must not be mentioned before toolbar[1]!
# SPACES have a meaning here! Do not use spaces, if you did not intend so!
#
# toolbar[0] is always main menu
toolbar[0][0]=dialog_tool[1]
toolbar[0][1]=dialog_tool[2]
toolbar[0][2]=general_tool[0]
toolbar[0][3]=toolbar[1],0,,SLOPETOOLS,slopetools.txt
toolbar[0][4]=toolbar[2],1,,RAILTOOLS,railtools.txt
toolbar[0][5]=toolbar[3],2,,MONORAILTOOLS,monorailtools.txt
toolbar[0][6]=toolbar[4],28,,MAGLEVTOOLS,maglevtools.txt
toolbar[0][7]=toolbar[5],3,,TRAMTOOLS,tramtools.txt
toolbar[0][8]=toolbar[6],4,,ROADTOOLS,roadtools.txt
toolbar[0][9]=toolbar[7],5,,SHIPTOOLS,shiptools.txt
toolbar[0][10]=toolbar[8],6,,AIRTOOLS,airtools.txt
toolbar[0][11]=toolbar[9],7,,SPECIALTOOLS,special.txt
toolbar[0][12]=general_tool[1]
toolbar[0][13]=-
toolbar[0][14]=dialog_tool[3]
toolbar[0][15]=toolbar[10],24,,EDITTOOLS,edittools.txt
toolbar[0][16]=toolbar[11],8,,LISTTOOLS,list.txt
toolbar[0][17]=dialog_tool[4]
toolbar[0][18]=dialog_tool[5]
toolbar[0][19]=-
toolbar[0][20]=simple_tool[2]
toolbar[0][21]=simple_tool[0]
toolbar[0][22]=simple_tool[1]
toolbar[0][23]=dialog_tool[0]
# invisible tools (here because they need a parameter or are added twice)
toolbar[0][24]=-
toolbar[0][25]=simple_tool[16]
toolbar[0][26]=simple_tool[7],,.,+1
toolbar[0][27]=simple_tool[7],,#44,-1
# since ST r2031: allow manual change of daylight
toolbar[0][28]=simple_tool[19],,+,+
toolbar[0][29]=simple_tool[19],,-,-
# slope tools
toolbar[1][0]=general_tool[2]
toolbar[1][1]=general_tool[3]
toolbar[1][2]=general_tool[4],10,,12 #southslope
toolbar[1][3]=general_tool[4],11,,3 #northslope
toolbar[1][4]=general_tool[4],12,,6 #westslope
toolbar[1][5]=general_tool[4],13,,9 #eastslope
toolbar[1][6]=general_tool[4],14,,16 #all up slope
toolbar[1][7]=general_tool[4],15,,17 #all down slope
toolbar[1][8]=general_tool[5]
# railtools
toolbar[2][0]=ways(2,0)
toolbar[2][1]=ways(2,1)
toolbar[2][2]=bridges(2)
toolbar[2][3]=tunnels(2)
toolbar[2][4]=wayobjs(2)
toolbar[2][5]=signs(2)
toolbar[2][6]=general_tool[17],16,,2
toolbar[2][7]=buildings(33,2)
toolbar[2][8]=buildings(34,2)
toolbar[2][9]=buildings(35,2)
toolbar[2][10]=buildings(35,0)
toolbar[2][11]=general_tool[14],,t,2
toolbar[2][12]=general_tool[18],,e,2
# monorailtools (waytype 5)
toolbar[3][0]=ways(5,0)
toolbar[3][1]=ways(5,1)
toolbar[3][2]=bridges(5)
toolbar[3][3]=tunnels(5)
toolbar[3][4]=wayobjs(5)
toolbar[3][5]=signs(5)
toolbar[3][6]=general_tool[17],17,,5
toolbar[3][7]=buildings(33,5)
toolbar[3][8]=buildings(34,5)
toolbar[3][9]=buildings(35,5)
# maglevtools (waytype 6)
toolbar[4][0]=ways(6,0)
toolbar[4][1]=ways(6,1)
toolbar[4][2]=bridges(6)
toolbar[4][3]=tunnels(6)
toolbar[4][4]=wayobjs(6)
toolbar[4][5]=signs(6)
toolbar[4][6]=general_tool[17],27,,6
toolbar[4][7]=buildings(33,6)
toolbar[4][8]=buildings(34,6)
toolbar[4][9]=buildings(35,6)
# tramtools (waytype 7)
toolbar[5][0]=ways(7,0)
toolbar[5][1]=ways(2,7)
toolbar[5][2]=wayobjs(7)
toolbar[5][3]=signs(7)
toolbar[5][4]=general_tool[17],16,,2
toolbar[5][5]=buildings(33,7)
toolbar[5][6]=buildings(34,7)
# road stops
#toolbar[4][7]=buildings(34,1)
# roadtools (waytype 1)
toolbar[6][0]=ways(1,0)
toolbar[6][1]=ways(1,1)
toolbar[6][2]=bridges(1)
toolbar[6][3]=tunnels(1)
toolbar[6][4]=wayobjs(1)
toolbar[6][5]=signs(1)
toolbar[6][6]=general_tool[17],18,,1
toolbar[6][7]=buildings(33,1)
toolbar[6][8]=buildings(34,1)
toolbar[6][9]=buildings(35,1)
toolbar[6][10]=buildings(35,0)
toolbar[6][11]=general_tool[14],,s,1
# shiptools (waytype 3)
toolbar[7][0]=ways(3,0)
toolbar[7][1]=ways(3,1)
toolbar[7][2]=bridges(3)
toolbar[7][3]=tunnels(3)
toolbar[7][4]=wayobjs(3)
toolbar[7][5]=signs(3)
toolbar[7][6]=general_tool[17],20,,3
toolbar[7][7]=buildings(33,3)
toolbar[7][8]=buildings(34,3)
toolbar[7][9]=buildings(11,3)
toolbar[7][10]=buildings(35,3)
toolbar[7][11]=buildings(35,0)
# airtools (waytype 16)
toolbar[8][0]=ways(16,0)
toolbar[8][1]=ways(16,1)
toolbar[8][2]=bridges(16)
toolbar[8][3]=wayobjs(16)
toolbar[8][4]=signs(16)
toolbar[8][5]=general_tool[17],21,,16
toolbar[8][6]=buildings(33,16)
toolbar[8][7]=buildings(34,16)
toolbar[8][8]=buildings(35,16)
toolbar[8][9]=buildings(35,0)
# specialtools
toolbar[9][0]=ways(2,255)
toolbar[9][1]=simple_tool[5]
toolbar[9][2]=general_tool[9]
toolbar[9][3]=general_tool[11]
toolbar[9][4]=general_tool[30]
toolbar[9][5]=ways(128,0)
toolbar[9][6]=bridges(128)
toolbar[9][7]=general_tool[8]
toolbar[9][8]=general_tool[6]
toolbar[9][9]=general_tool[31]
toolbar[9][10]=general_tool[14],,l,128
toolbar[9][11]=dialog_tool[24]
# editor tools
toolbar[10][0]=general_tool[10],22,,+100
toolbar[10][1]=general_tool[10],23,,-100
toolbar[10][2]=general_tool[9]
toolbar[10][3]=general_tool[11]
toolbar[10][4]=general_tool[30]
toolbar[10][5]=general_tool[14],25,,city_road
toolbar[10][6]=ways(3,255)
toolbar[10][7]=simple_tool[3]
toolbar[10][8]=dialog_tool[20],,(
toolbar[10][9]=general_tool[26]
toolbar[10][10]=dialog_tool[21],,/
toolbar[10][11]=dialog_tool[22],,&
toolbar[10][12]=dialog_tool[23],,�
toolbar[10][13]=general_tool[28]
toolbar[10][14]=simple_tool[6]
# list tools
toolbar[11][0]=dialog_tool[14]
toolbar[11][1]=dialog_tool[15]
toolbar[11][2]=dialog_tool[16]
toolbar[11][3]=dialog_tool[17]
toolbar[11][4]=dialog_tool[18]
toolbar[11][5]=dialog_tool[19]
toolbar[11][6]=dialog_tool[25]
# EOF
I hope that this is helpful :-)