Add UI setting to disable mass action buttons for top-level vehicle lists

src/table/settings.ini

@@ -4148,6 +4148,15 @@ str      = STR_CONFIG_SETTING_SHOW_ADV_LOADING_MODE_FEATURES
 strhelp  = STR_CONFIG_SETTING_SHOW_ADV_LOADING_MODE_FEATURES_HELPTEXT
 cat      = SC_EXPERT
 
+[SDTC_BOOL]
+var      = gui.disable_top_veh_list_mass_actions
+flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
+def      = false
+str      = STR_CONFIG_SETTING_DISABLE_TOP_VEH_LIST_MASS_ACTIONS
+strhelp  = STR_CONFIG_SETTING_DISABLE_TOP_VEH_LIST_MASS_ACTIONS_HELPTEXT
+proc     = RedrawScreen
+cat      = SC_EXPERT
+
 ; For the dedicated build we'll enable dates in logs by default.
 [SDTC_BOOL]
 ifdef    = DEDICATED