Phoenix: slight reformatting to the `sized_controls.py` docstrings and substituted "print" with "print()"

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73666 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
AGW on Phoenix: initial port of the `persist` library to Phoenix.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73667 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Phoenix: patched `wx.lib.utils` from Werner , adjusted the docstrings and few other minor modifications.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73668 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Phoenix: small changes to docstrings in `sized_controls.py` and `persist`

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73669 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
AGW on Phoenix: use `SetDeviceClippingRegion` in `tabart.py` when the argument is a `wx.Region`

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73670 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
AGW on Phoenix: remove `wx.GenericDatePickerCtrl` from `persist_handlers.py`

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73671 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775