Patch from Will Sadkin:

Patch from Will Sadkin:

- Fixed intra-right-insert-field erase.
- Allowed right-insert in ipaddrctrl subfields.
- Made _SetValue() place cursor after last non-blank character inserted,
  rather than end of mask.
- Fixed combobox autoselect behavior to work similarly as above, so that
  said selection will only select the non-empty text, as per request.
- Fixed some incorrect undo behavior for right-insert fields
- Allowed derived classes (eg. numctrl) to pass modified values for undo
  processing (to handle/ignore grouping chars properly.)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27898 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775