Keep track of adding domains to remove loader when user has no actionable entities

[dshokouhi]

Summary

Fixes #3756 by keeping track of when we first load domains so we only show the loader for a brief period of time instead of endlessly when a user has no entities that are considered actionable by the app.

at a minimum users will have 1 person entity so we should expect once domains are loaded that we have all entities

Screenshots

Link to pull request in Documentation repository

Documentation: home-assistant/companion.home-assistant#

Any other notes

[jpelgrom]

You should also invalidate if domainsAdded was false

[dshokouhi]

You should also invalidate if domainsAdded was false

done I didnt add it initially as the value only changes once :)