work in progress API changes to nsIEditor and nsEditor git-svn-id: svn://10.0.0.236/trunk@18914 18797224-902f-48f8-a5cc-f745e15eee43
* added DeleteSelection to editor. Doesn't work very well yet because selection is giving me random offsets into text content. * lots of work in the various transactions. git-svn-id: svn://10.0.0.236/trunk@18122 18797224-902f-48f8-a5cc-f745e15eee43