* Explain a rate limiting push gateway in the notification troubleshooter
The push loop back test printed whatever HTTP status the gateway
answered, so a user throttled by the public ntfy.sh gateway was told
"Error: HTTP 507", which reads as a server fault rather than as a quota
they can wait out or move away from.
Map the two statuses that mean the notification was throttled onto a
typed failure and give the troubleshooter a message that says what to do.
* Import strings from localazy, remove `temporary.xml` in `:libraries:push:impl`
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Co-authored-by: Jorge Martín <jorgem@element.io>
hayyaksi
12791406ca