Richtext interface fixes and additions for Phoenix

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73895 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Richtext interface fixes and additions for Phoenix

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73896 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
export wxRichTextObjectPtrArrayArray since it is used in the public API.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73897 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775