wxPython on Classic: add statement that HyperTreeList is supported on all platforms.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@77712 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
wxPython on Phoenix: add statement that HyperTreeList is supported on all platforms.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@77713 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775