Enable delete button if editor is in a user group that can delete page

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code@10378 5227b50d-9349-4574-b055-4b0a7525e11c
Follow up to last commit

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code@10379 5227b50d-9349-4574-b055-4b0a7525e11c