Feature/manga migration (#536)

* Add "migration" tab to "Browse" screen

* Add missing useEffect cleanup for navbar title and actions

* Make "SourceGridLayout" reusable

* Add migration tab to "Browse"

* Add migration logic

src/screens/settings/ServerSettings.tsx

@@ -55,6 +55,11 @@ export const ServerSettings = () => {
     useEffect(() => {
         setTitle(t('settings.server.title.settings'));
         setAction(null);
+
+        return () => {
+            setTitle('');
+            setAction(null);
+        };
     }, [t]);
 
     const { data } = requestManager.useGetServerSettings();