it in wxButton implementations in (almost) all ports; changed its return type
to "wxWindow *" from "void" to accommodate the ports needing the old default
item (replaces part of patch 1696563)
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45338 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1. removed ApplyParentThemeBackground() not used any longer
2. removed ProvidesBackground() which is synonymous with
!HasTransparentBackground()
3. removed a whole bunch of unused MSWXXX() methods
4. moved MSWControlColor() from wxWindow up to wxControl
results:
1. the gradient is still shown properly for static/radio boxes in notebooks
2. correct background colour is used for the static boxes
3. code is shorter and better commented
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33474 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
