ui: Refactored context menu API, added file path actions in graph and code

* Add 'copy full path' and 'show containing folder' actions to graph view, code view
* Added file path to file node tooltip

bug id = 320

src/lib_gui/qt/graphics/QtGraphicsView.h

@@ -1,13 +1,12 @@
 #ifndef QT_GRAPHICS_VIEW_H
 #define QT_GRAPHICS_VIEW_H
 
+#include <functional>
 #include <memory>
 
 #include <QGraphicsView>
 
-#include <memory>
-
-#include <functional>
+#include "utility/file/FilePath.h"
 
 class QTimer;
 class QtGraphNode;