Explicitly refresh when enable is called so the display will update.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@18854 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/wxPython/lib/buttons.py

@@ -133,6 +133,11 @@ class wxGenButton(wxPyControl):
         return self.IsShown() and self.IsEnabled()
 
 
+    def Enable(self, enable=true):
+        wxPyControl.Enable(self, enable)
+        self.Refresh()
+
+
     def SetBezelWidth(self, width):
         """Set the width of the 3D effect"""
         self.bezelWidth = width