Be able to see only several contexts, not all

[deemeetree]

Add a plus button next to every context in menu, so that when it's clicked the context is added to the one shown (almost like intersection but without highlighting).

The more can be added through expanding the addcontext variable or creating a special /add/ path which produces a new context but constructed through the urls. when we edit it, we edit the new add_ context (alphabet direction of names).

Like this a nice action flow can be created.