fixed rectangle selection

ui/timelinearea.cpp

@@ -80,6 +80,16 @@ void TimelineArea::SetAlignment(olive::timeline::Alignment alignment)
   RefreshLabels();
 }
 
+TrackList *TimelineArea::track_list()
+{
+  return track_list_;
+}
+
+TimelineView *TimelineArea::view()
+{
+  return view_;
+}
+
 void TimelineArea::wheelEvent(QWheelEvent *event)
 {