Switching to activities bevor powering on
**Is your feature request related to a problem? Please describe.**

I would like to choose the activity BEFORE powering it on  with HarmonyPlugin/Home app. Its because i do have some Activities without Screen --> (like "Music") but in Home app i have to poweron first and then change the Activity so some components like the TV has to be swiched on always.

**Describe the solution you'd like**

In Home App it would be great to be abel to choose the Activity first before powering on (I remember that worked in an earlier version)


**Describe alternatives you've considered**

Creating an Empty Activity as a first "Startup activity where no Hifi Components were switched on

**Additional context**
Add any other context or screenshots about the feature request here.
