Goto/Jump/Cycle through open repositories

When groups are collapsed, there is no easy way to find an open repository (specially if one is using nested groups; see https://smartgit.userecho.com/communities/1/topics/291-highlight-group-name-of-opened-repository, too).

It would be great to have either (or all :-)) of:

* A function (menu entry, toolbar button, keyboard shortcut) to jump to the next open repository (invoking the action multiple times would cycle through open repositories)

* A list of open repositories in the window-menu

* Integration into "Find Object", e.g. either list open repos first or use a special command like "open" to list open repositories