Add GetParser methods for the tag handlers

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73839 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Add ctor for wxHtmlWinTagHandler

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73840 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Add documentation for some additional cell types so they can be seen in Phoenix

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73841 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775