This allows the program to distinguish between some other, unspecified, warnings and this one which can and does happen whenever too many changes occur too quickly but which has a clearly defined work around: the state kept inside the program just needs to be refreshed by rescanning the directory anew. See #12847. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74950 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775