finished merge of viewer and footage

app/widget/projectexplorer/projectexplorer.cpp

@@ -95,6 +95,8 @@ ProjectExplorer::ProjectExplorer(QWidget *parent) :
   connect(tree_view_, &ProjectExplorerTreeView::customContextMenuRequested, this, &ProjectExplorer::ShowContextMenu);
   connect(list_view_, &ProjectExplorerListView::customContextMenuRequested, this, &ProjectExplorer::ShowContextMenu);
   connect(icon_view_, &ProjectExplorerIconView::customContextMenuRequested, this, &ProjectExplorer::ShowContextMenu);
+
+  connect(&model_, &ProjectViewModel::ItemRemoved, this, &ProjectExplorer::ItemRemoved);
 }
 
 const ProjectToolbar::ViewType &ProjectExplorer::view_type() const

app/widget/projectexplorer/projectexplorer.h

@@ -100,6 +100,8 @@ signals:
    */
   void DoubleClickedItem(Node* item);
 
+  void ItemRemoved(Node* node);
+
 private:
   /**
    * @brief Get all the blocks that solely rely on an input node