restoring of mediafiles failed

missed a line in my last commit

This makes it easier to create tabs with an active tab (no need for
additional markup)

A few fixes.

this was an accidental commit to master

This reverts commit f7f7fb6c.

This introduces a mechanism to override what happens when a media item
is selected in the media manager popup by providing a callback name in
the URL. The default implementation just does what
dw_mediamanager.insert did before and calls insertTags()

Plugin translation #1

autor duplicated + < and > fixes.

* contributors duplication
* adding myself to the contributors' list
* typo

* Created two new options to enable or disable the editing of the display name or the email address in Active Directory. This will allow for the admin to turn the edit feature off if it is not desired that the user could edit their attributes or to prevent errors in case AD does not permit the user to update these attributes.