use names for gs_requestFrameExtentsStatus values

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74661 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix typo in wxSingleInstanceChecker docs, props Lauri Nurmi.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74663 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775