Add client setting to show leftover ticks in timetable.

src/table/settings.ini

@@ -3404,6 +3404,15 @@ strhelp  = STR_CONFIG_SETTING_TIMETABLE_IN_TICKS_HELPTEXT
 proc     = InvalidateVehTimetableWindow
 cat      = SC_EXPERT
 
+[SDTC_BOOL]
+var      = gui.timetable_leftover_ticks
+flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
+def      = false
+str      = STR_CONFIG_SETTING_TIMETABLE_LEFTOVER_TICKS
+strhelp  = STR_CONFIG_SETTING_TIMETABLE_LEFTOVER_TICKS_HELPTEXT
+proc     = InvalidateVehTimetableWindow
+cat      = SC_EXPERT
+
 [SDTC_BOOL]
 var      = gui.time_in_minutes
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC