[FIX] "Discussions" item in "More" menu not hidden, when Discussions are disabled (#14684)

app/discussion/client/tabBar.js

@@ -1,6 +1,7 @@
 import { Meteor } from 'meteor/meteor';
 
 import { TabBar } from '../../ui-utils/client';
+import { settings } from '../../settings';
 
 Meteor.startup(function() {
 	return TabBar.addButton({
@@ -10,5 +11,6 @@ Meteor.startup(function() {
 		icon: 'discussion',
 		template: 'discussionsTabbar',
 		order: 10,
+		condition: () => settings.get('Discussion_enabled'),
 	});
 });