Patches from Will Sadkin:

Patches from Will Sadkin:

MaskedEditMixin:
- fixed size calculations on changing fonts
- fixed tabbing logic now that tab events are entered into the control
  by default (ie event.Skip()) if wx.TE_PROCESS_TAB is set
- fixed code attempting to fix the selection after focus events
  generated on control destruction, to prevent tracebacks

TextCtrl, ComboBox
- Added support for XRC
- Fixed sizing calculation code
- Added SetFont() override method that will recalculate the size if this
  is called.
- Added AppendItems() for ComboBox

NumCtrl:
- prevented ctrl from accepting same grouping and decimal character,
- fixed issue preventing paste from working if decimal char was different
  than '.'

TimeCtrl:
- Fixed default value to use 24hour time (which will be converted
  appropriately if format supports it, and added code to check if
  local timezone uses "AM/PM" for this concept; if not, control now
  defaults to 24hour format, and disallows the am/pm form.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28400 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775