Changes:
- some missing wxGrid constants added
- fixed Wx::AUI events broken since wxWidgets 2.9.5
- rt96136 - added GetContentScaleFactor to Wx::DC && Wx::Window
- rt99038 - MACOSX_DEPLOYMENT_TARGET comparison fixed in Wx build
- wxMenuItem::SetBitmap available on OSX
- added some missing TextEntry methods to wxComboBox - rt102269
- fix option handling
- fix MacOSX builds with recent Xcode versions