better documentation for subscription feature

[alexandervlpl]

Is your feature request related to a problem? Please describe.
Both for regular app users and server admins, it's really not clear what a subscription is or how it's implemented. I found the JSON documentation with some difficulty, but questions remain:

• Will the app fetch profiles in the background automatically? How often?
• Does the user still need to manually select a profile?
• Is there a "failover" mechanism if a profile is unavailable?
• Will old profiles that are no longer in the subscription config get deleted?

Describe the solution you'd like
At least some clear documentation about all this. Maybe even a help button right in the subscription section of app? This can open a small info screen or even a link to a HOWTO/FAQ page somewhere here.

[alexandervlpl]

To answer one of my questions:

Will the app fetch profiles in the background automatically? How often?

No. Subscriptions can only be synced manually by the user, which is unexpected behavior and sadly defeats the entire purpose of a "subscription".