timeline: implement reveal in project action

app/widget/projectexplorer/projectexplorer.h

@@ -85,6 +85,8 @@ public:
 
   void DeleteSelected();
 
+  bool SelectItem(Node *n);
+
 public slots:
   void set_view_type(ProjectToolbar::ViewType type);
 
@@ -138,6 +140,8 @@ private:
 
   static QString GetHumanReadableNodeName(Node* node);
 
+  void UpdateNavBarText();
+
   /**
    * @brief Get the currently active QAbstractItemView
    */