Add docs for SetMin and SetMax

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74012 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
More richtext fixes and cleanup for Phoenix

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74013 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Add richtext event types.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74014 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775