use DisplayLoad for main menu box and to disable options when world=Empty

addons/optionsmenu/CfgEventHandlers.hpp

@@ -1,10 +1,21 @@
+
 class Extended_PreInit_EventHandlers {
     class ADDON {
         init = QUOTE(call COMPILE_FILE(XEH_preInit));
     };
 };
+
 class Extended_PostInit_EventHandlers {
     class ADDON {
         init = QUOTE(call COMPILE_FILE(XEH_postInit));
     };
 };
+
+class Extended_DisplayLoad_EventHandlers {
+    class RscDisplayMain {
+        GVAR(loadMainMenuBox) = QUOTE(_this call COMPILE_FILE(init_loadMainMenuBox));
+
+        //Hide the button if there is no world (-world=empty)
+        GVAR(hideButtonEmptyWorld) = "((_this select 0) displayCtrl 80085) ctrlShow (missionName != '');";
+    };
+};

addons/optionsmenu/gui/pauseMenu.hpp

@@ -101,10 +101,6 @@ class RscDisplayMovieInterrupt: RscStandardDisplay {
     };
 };
 class RscDisplayMain: RscStandardDisplay {
-    //Hide the button if there is no world (-world=empty)
-    //Seems odd to use onMouseMoving, but I don't want to overload onLoad
-    onMouseMoving = QUOTE(((_this select 0) displayCtrl 80085) ctrlShow (missionName != '');  _this execVM QUOTE(QUOTE(PATHTOF(script_loadMainMenuBox.sqf))););
-
     class controls {
         class ACE_Open_settingsMenu_Btn : ACE_Open_SettingsMenu_BtnBase {
             action = "if (missionName != '') then {createDialog 'ACE_settingsMenu';};";