Make Notifications more responsive

[silasmue]

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Is your feature request related to a problem? Please describe.
Calls in NextCloud Talk Desktop App need up to 55s until the pop-up or any other notification gets displayed, same for messages. Messages are only instant if you joined a chatroom.

Describe the solution you'd like
It would be nice if the app is more responsive in terms of notifications. I think that is not a problem with the backend, because on iOS the notifications for messages or calls are instant (under 5s).

Describe alternatives you've considered
At the moment, as far as I understand the code the app polls for new notifications every ~30s which is just to slow if you really want to answer a call and not call back 1min after.

Additional context
At the moment I am running:
NextCloud Talk Desktop: 1.0.1
Nextcloud 30.0.4
NextCloud Talk 20.1.3

[ShGKme]

At the moment, as far as I understand the code the app polls for new notifications every ~30s which is just to slow if you really want to answer a call and not call back 1min after.

Only as a fallback when there is no notify_push.