Bitmap for the close button is scaled based on GetContentScaleFactor(). On OS X the resulting bitmap has to use the correct scaling factor in order to be displayed correctly on the button when using a high resolution display.
This keyword is not expanded by Git which means it's not replaced with the
correct revision value in the releases made using git-based scripts and it's
confusing to have lines with unexpanded "$Id$" in the released files. As
expanding them with Git is not that simple (it could be done with git archive
and export-subst attribute) and there are not many benefits in having them in
the first place, just remove all these lines.
If nothing else, this will make an eventual transition to Git simpler.
Closes#14487.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74602 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Such buttons may be needed in other places and it's not obvious to create
them, so add a new public wxBitmapButton::NewCloseButton() method to allow
creating them easily.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72474 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
