macosx: preserve settings done through the menus across vouts via the playlist object (close #6550)

(cherry picked from commit 1b00b4a7cdfe9fa9bc576f0df396a432e7f840c1)

modules/gui/macosx/MainMenu.m

@@ -1125,6 +1125,10 @@ static VLCMainMenu *_o_sharedInstance = nil;
     assert([data isKindOfClass:[VLCAutoGeneratedMenuContent class]]);
     VLCAutoGeneratedMenuContent *menuContent = (VLCAutoGeneratedMenuContent *)data;
 
+    /* Preserve settings across vouts via the playlist object: */
+    if( !strcmp( [menuContent name], "fullscreen" ) || !strcmp( [menuContent name], "video-on-top" ) )
+        var_Set( pl_Get( VLCIntf ), [menuContent name] , [menuContent value] );
+
     p_object = [menuContent vlcObject];
 
     if( p_object != NULL )