Feature request for Manager: add routing functionality to support routes directly to different tabs

[jensbrak]

It could be rather useful to be able to provide a link routing an administrator directly to a specific tab of a Manager page.

For instance (as discussed in #1339 ) offer a direct link in a notification that a comment has been posted, ie provide the possibility to click that link and end up in the tab for, say, Pending comments to manage. I believe there might be many other scenarios that could use routing to client UI states (or whatever it is called) inside the Manager.