Merge branch 'tracerestrict-sx' into jgrpp

# Conflicts:
#	src/command.cpp
#	src/group_gui.cpp
#	src/lang/english.txt
#	src/saveload/extended_ver_sl.cpp
#	src/settings_gui.cpp
#	src/tracerestrict.cpp
#	src/tracerestrict.h
#	src/tracerestrict_gui.cpp
#	src/vehicle_gui.cpp
#	src/vehicle_gui_base.h
#	src/vehiclelist.cpp
#	src/window_type.h

src/table/settings.ini

@@ -4029,6 +4029,15 @@ str      = STR_CONFIG_SETTING_SHOW_RESTRICTED_SIG_DEF
 strhelp  = STR_CONFIG_SETTING_SHOW_RESTRICTED_SIG_DEF_HELPTEXT
 proc     = RedrawScreen
 
+[SDTC_BOOL]
+var      = gui.show_adv_tracerestrict_features
+flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
+def      = false
+str      = STR_CONFIG_SETTING_SHOW_ADV_TRACE_RESTRICT_FEATURES
+strhelp  = STR_CONFIG_SETTING_SHOW_ADV_TRACE_RESTRICT_FEATURES_HELPTEXT
+proc     = RedrawScreen
+cat      = SC_EXPERT
+
 ; For the dedicated build we'll enable dates in logs by default.
 [SDTC_BOOL]
 ifdef    = DEDICATED