Thanks for your review.

What do you mean by "I can't set all tabs aside"? `Set aside` will still set all tabs (except those in an active session) aside. You can also add tabs to the session using the tab context menu (right click on the tab -> Tabs Aside).

But I really like the idea of tracking a whole window, therefore I created an issue for that: https://github.com/tim-we/tabs-aside/issues/21