closes #7056

closes #7054

related to #7032

Signed-off-by: Lukas Matt <lukas@zauberstuhl.de>

closes #7038

The same as #7009 but now all of them ;)

Fix regressions from #6998

bump diaspora_federation

* fixed old reshares of reshares
* fixed deleted root of a reshare

[ci skip]

Remove started sharing notifications where the contact doesn't exist

Fix misplaced publisher prefill on tags page

Remove stream title from main stream

Move notifications and conversations links in collapsed header on small devices

Fix stream shortcuts on small screens

Use Person.by_account_identifier to find the author

Use https for the pod_uri if require_ssl is true

Before #6873 we deleted contacts when someone blocks a person, but we
didn't drop the notification for the started sharing event. In #6864
we try to get the contact for the notification, which is not there
anymore.

So we need to remove the notifications for the contacts that don't exit
anymore.

don't add the root author to the subscribers if the root post was deleted