AdminPanel: allow for multi domain installations
Quite often editors request the possibility to have the AdminPanel also working in multi domain installations.
Imagine the following use case. The editor has opened the TYPO3 backend via foo.com/typo3. The installation hosts 3 domains: foo.com, bar.com and baz.com. All of them represent a specific area of the page tree with own starting points.
In the described use case the editor can preview hidden content of foo.com but is not able to preview content of bar.com or baz.com. It would be great to find a user friendly solution for this problem which does not require logging in on all 3 domains.