Description: The user signature button needs to be disabled when a user is
editing articles in the main section of Wikipedia (i.e. pages that are intended
to be articles). This problem leads to user confusion and an unnecessary user
signature in articles. Further, this will prevent the need for clean up of
articles with Special:Cross-name space page.
Suggested fix: Leave the user signature button in the toolbar on main Wikipedia
articles, but disable its function and have a mouse-over tool tip that reads
"User signatures are disabled in the editing of Wikipedia articles".