projectpanel: select nodes when items are selected in the project explorer

app/widget/projectexplorer/projectexplorer.h

@@ -100,6 +100,8 @@ signals:
    */
   void DoubleClickedItem(Node* item);
 
+  void SelectionChanged(const QVector<Node *> &selected);
+
 private:
   /**
    * @brief Get all the blocks that solely rely on an input node
@@ -185,6 +187,8 @@ private slots:
 
   void ContextMenuStartProxy(QAction* a);
 
+  void ViewSelectionChanged();
+
 };
 
 }