Docview and IDE patch from Morag Hua with fix for bug #1217890

"Closing view crashes Python" plus some new features:

    New feature added to the IDE is 'Extensions'.  Under
    Tools|Options|Extensions, you can add calls to external programs.
    For example you can add a "Notepad" extension (under windows) that
    will exec Notepad on the currently open file.  A new "Notepad"
    menu item will appear under the Tools menu.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34638 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/samples/pydocview/PyDocViewDemo.py

@@ -90,6 +90,8 @@ class TextEditorApplication(pydocview.DocApp):
         if os.path.exists("tips.txt"):
             wx.CallAfter(self.ShowTip, wx.GetApp().GetTopWindow(), wx.CreateFileTipProvider("tips.txt", 0))
 
+        wx.UpdateUIEvent.SetUpdateInterval(400)  # Overhead of updating menus was too much.  Change to update every 400 milliseconds.
+
         # Tell the framework that everything is great
         return True