stop editing on deactivate (closes #14801)

(cherry picked from commit edb8335a6eb5ceb6406a36a6e2b1fd85041c7899)

Sources/VLCAppDelegate.m

@@ -307,6 +307,7 @@ continueUserActivity:(NSUserActivity *)userActivity
 - (void)applicationWillResignActive:(UIApplication *)application
 {
     _passcodeValidated = NO;
+    [self.playlistViewController setEditing:NO animated:NO];
     [self validatePasscode];
     [[MLMediaLibrary sharedMediaLibrary] applicationWillExit];
 }