Add setting to show order number in vehicle view window

src/table/settings/settings.ini

@@ -5919,6 +5919,14 @@ strhelp  = STR_CONFIG_SETTING_SHOW_VEHICLE_GROUP_HIERARCHY_NAME_HELPTEXT
 post_cb  = [](auto) { MarkWholeScreenDirty(); }
 cat      = SC_ADVANCED
 
+[SDTC_BOOL]
+var      = gui.show_order_number_vehicle_view
+flags    = SF_NOT_IN_SAVE | SF_NO_NETWORK_SYNC
+def      = false
+str      = STR_CONFIG_SETTING_SHOW_ORDER_NUMBER_IN_VEHICLE_VIEW
+strhelp  = STR_CONFIG_SETTING_SHOW_ORDER_NUMBER_IN_VEHICLE_VIEW_HELPTEXT
+post_cb  = [](auto) { SetWindowClassesDirty(WC_VEHICLE_VIEW); }
+
 ; For the dedicated build we'll enable dates in logs by default.
 [SDTC_BOOL]
 ifdef    = DEDICATED