Fix execution of "windowbuttonmotionfcn" with uipanels (bug #46151) * Canvas.cc (Canvas::canvasMouseMoveEvent): decide here to update the currentpoint and run "windowbuttonmotionfcn" if the latter is not empty * Canvas.h: remove unused "enableCurrentPointUpdates" method and "m_updateCurrentPoint" attribute * Figure.h: declare a new private method "enableMouseTracking" * Figure.cc (Figure::Figure): use "enableMouseTracking" instead of "update" on "windowbuttonmotionfcn". * Figure.cc (Figure::update): mouse tracking is now enabled unconditionally so remove unused case "windowbuttonmotionfcn". *Figure.cc(Figure::eventNotifyAfter): enable mouse tracking on new children widgets.

--- a/libgui/graphics/Figure.h	Fri Oct 09 16:25:27 2015 +0200
+++ b/libgui/graphics/Figure.h	Sat Oct 10 12:21:37 2015 +0200
@@ -113,6 +113,8 @@
   void save_figure_callback (const std::string& file);
   void copy_figure_callback (const std::string& format);
 
+  void enableMouseTracking (void);  
+
 private slots:
   void setMouseMode (MouseMode mode);
   void fileSaveFigure (bool prompt = false);