Fire off notification for failed recommended app installs

[rullzer]

In the recommended install we know when an app fails to install. If this is the case we should post to a special endpoint so that once things continue a notification is waiting for the admin that not everything could be installed and that manual steps might be required.

As a first step we could just link to the new bundle page.

CC: @ChristophWurst @jancborchardt

[ChristophWurst]

That or we dispatch a background job that installs the app?

[rullzer]

That or we dispatch a background job that installs the app?

For the huge documentserver this will still most likely fail as background jobs run in ajax to start with...

[rullzer]

Or just do both ;)

[ChristophWurst]

We can also detect which kind of cron is used ;)

[ChristophWurst]

Okay, not for a new instance maybe 🤔

[rullzer]

Okay, not for a new instance maybe thinking

yes we can. But it will just always be ajax :P