Feature Request: A progress bar on the Sidekick GUI

[baermathias]

Is your feature request related to a problem? Please describe.
It took me more than 20 minutes to start an amulated device and run an app on it. Started at 08:43:04.700 and finished at 09:04:39.841. Due to the reason that the console messages make it not 100% clear whether Sidekick is still working or not, a progress bar would make sense. And it would not only make sense at startup, but also at runtime, because code changes also sometimes need a few minutes. This feature would prevend that people close the app by themself because they might think that it already crashed or is unstable.

Describe the solution you'd like
A visual progress bar on the Sidekick GUI instead of the loading icon.

Describe alternatives you've considered
A progress bar inside the Sidekick console.