Switch to side-by-side view

--- a/GUI/playlist/view/PlaylistView.h
+++ b/GUI/playlist/view/PlaylistView.h
@@ -70,7 +70,6 @@
     virtual ~PlaylistView();
 
     void set_context_menu_actions(int actions);
-    void set_drag_enabled(bool b);
     void set_mimedata(MetaDataList& v_md, QString text);
     void clear();
     void fill(MetaDataList& v_metadata, int cur_play_idx);
@@ -121,7 +120,6 @@
     QTimer*         m_usertimer;
 
     bool            _drag;
-    bool            _drag_allowed;
     bool            _inner_drag_drop;
 
     QPoint          _drag_pos;