began some rewrites to timeline drawing

app/window/mainwindow/mainwindow.cpp

@@ -341,7 +341,7 @@ void MainWindow::ProjectClose(Project *p)
 
   // Close any open footage in footage viewer
   QVector<Item*> footage = p->get_items_of_type(Item::kFootage);
-  QList<Footage*> footage_in_viewer = footage_viewer_panel_->GetSelectedFootage();
+  QVector<Footage*> footage_in_viewer = footage_viewer_panel_->GetSelectedFootage();
 
   if (!footage_in_viewer.isEmpty()) {
     // FootageViewer only has the one footage item