qt4 - Playlist: move the column selection to a submenu.

modules/gui/qt4/playlist_model.cpp

@@ -959,8 +959,10 @@ void PLModel::popup( QModelIndex & index, QPoint &point, QModelIndexList list )
 
         ContextUpdateMapper = new QSignalMapper(this);
 
+        QMenu *selectColMenu = new QMenu( qtr("Show columns") );
+
 #define ADD_META_ACTION( meta ) { \
-   QAction* option = menu->addAction( qfu(VLC_META_##meta) );                   \
+   QAction* option = selectColMenu->addAction( qfu(VLC_META_##meta) );     \
    option->setCheckable( true );                                           \
    option->setChecked( rootItem->i_showflags & VLC_META_ENGINE_##meta );   \
    ContextUpdateMapper->setMapping( option, VLC_META_ENGINE_##meta );      \
@@ -978,7 +980,7 @@ void PLModel::popup( QModelIndex & index, QPoint &point, QModelIndexList list )
         ADD_META_ACTION( DESCRIPTION );
 
 #undef ADD_META_ACTION
-
+        menu->addMenu( selectColMenu );
         menu->popup( point );
     }
     else