implementing canBecomeKeyView for user panes, native focus support, fixes #15070

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73610 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
avoid infinite recursion for richtooltops, (hopefully) fixes #15070

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73614 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775