Merge branch 'tracerestrict-sx' into jgrpp

# Conflicts:
#	src/group_cmd.cpp
#	src/group_gui.cpp
#	src/lang/english.txt
#	src/saveload/extended_ver_sl.cpp
#	src/tracerestrict.cpp
#	src/tracerestrict.h
#	src/tracerestrict_gui.cpp

src/group_cmd.cpp

@@ -22,6 +22,7 @@
 #include "core/pool_func.hpp"
 #include "order_backup.h"
 #include "tbtr_template_vehicle.h"
+#include "tracerestrict.h"
 
 #include "table/strings.h"
 
@@ -351,6 +352,9 @@ CommandCost CmdDeleteGroup(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3
 		/* Delete all template replacements using the just deleted group */
 		deleteIllegalTemplateReplacements(g->index);
 
+		/* notify tracerestrict that group is about to be deleted */
+		TraceRestrictRemoveGroupID(g->index);
+
 		/* Delete the Replace Vehicle Windows */
 		DeleteWindowById(WC_REPLACE_VEHICLE, g->vehicle_type);
 		delete g;