Applied patch from Pim Van Heuven that modifies 4 files:

- wxPython/demo/ListCtrl_edit.py (new demo)
    - wxPython/demo/Main.py (include new demo in demo app)
    - wxPython/wx/lib/mixins/listctrl.py (several improvements to
      TextEditMixin)
    - wxPython/wx/lib/wxpTag.py (some small fixes)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29883 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/demo/Main.py

@@ -50,6 +50,7 @@ _treeList = [
         'StockButtons',
         'Ticker',
         'Choicebook',
+        'ListCtrl_edit',
         ]),
 
     # managed windows == things with a (optional) caption you can close
@@ -98,6 +99,7 @@ _treeList = [
         'ListBox',
         'ListCtrl',
         'ListCtrl_virtual',
+        'ListCtrl_edit',
         'Listbook',
         'Menu',
         'Notebook',