[RFE] Allow to keep terminal dialogs independently from the views where they started

[joaquimrocha]

Current situation

We have terminals being shown in a dialog but they only live as long as the user stays in the respective route. Some users may want to keep a terminal open while checking other data though.

Impact

Users cannot easily keep terminal windows around while navigating to other places.

Ideal future situation

It'd be nice to have terminals around, in a minimized form, while navigating through Headlamp. Yet, since this requires some more complex design + implementation, we can as well have an option to pop-out terminal dialogs into their own windows, which also allows users to focus on the terminals.

So this issue has two parts:

• [ ] Allow to minimize terminals and keep their around independently from the routes/views we're using
• [ ] Allow to pop-out terminal dialogs into their own windows