Switch to side-by-side view

--- a/GUI/playlist/view/PlaylistView.cpp
+++ b/GUI/playlist/view/PlaylistView.cpp
@@ -91,7 +91,8 @@
         pos.setY(pos.y());
         pos.setX(pos.x() + 10);
 
-        _rc_menu->exec(pos);
+		if (_rc_menu)
+			_rc_menu->exec(pos);
 
         break;