Investigate having several plugins in one app

[arndtjonasson]

The structure today supports having several plugins associated with/contained in one app. There is also code which does the right thing in that case. Today, there is no way to create such an app. Is it desirable to have this functionality? Then make it work throughout. If it never will be, remove the possibility. If it may be some time, keep the parts that work and don't introduce simplifications that make this harder.

[arndtjonasson]

Not least, stick to a consistent naming. We have to be able to talk about apps on the one hand, and their plugins on the other hand.

[arndtjonasson]

Among the existing plugins are two which cooperate, and are both present in their config file: AutoBrake and UltraSonicReader. I don't know if this is a genuine example. The way to run them today is to install one and then the other.

Uploading several plugins at one time could be done by extending the file selection to accept several files, and the server to be prepared for that.