Link pop up should not appear for non-authorized users

[bradtem]

Good plugin, but the "Edit" pop up appears even for users who are not authorized to edit the page (or any pages.) On wikis that only have editing by logged in users (or have ACLs) it may make more sense not to have the pop-up.

In addition, if a non-logged in user clicks the edit link they get the standard permission denied link for pages that don't exist, rather than the customized page given to non-users who go to pages that don't exist. However, if the pop-up is removed this is not an issue.