sonata-project/SonataAdminBundle — pull request #1597 by dunglas (2013-08-27 22:09:54+00:00)
Title: Allow adding extensions to all admins

This is currently not possible to add an extension to all defined admins. This PR adds this feature.
To use it, just tag an extension with `sonata.admin.extension` and no target.

The doc and tests have been updated accordingly.