Update MenuFlags to work as expected

* 'popParent' has been removed
* 'noHistory' now works as expected
* Mods that explicitly want noHistory can state such in their constructor()

core/message_base_search.js

@@ -113,7 +113,6 @@ exports.getModule = class MessageBaseSearch extends MenuModule {
         const returnNoResults = () => {
             return this.gotoMenu(
                 this.menuConfig.config.noResultsMenu || 'messageSearchNoResults',
-                { menuFlags: ['popParent'] },
                 cb
             );
         };
@@ -160,7 +159,6 @@ exports.getModule = class MessageBaseSearch extends MenuModule {
                     messageList,
                     noUpdateLastReadId: true,
                 },
-                menuFlags: ['popParent'],
             };
 
             return this.gotoMenu(