Make navigating on the admin page feel more responsive (either by faster page loads or by SPA)

[MariusBluem]

The new admin page split (#796) reloads the whole page if you click on another element at the sidebar, which looks quit strange 😁

cc @nextcloud/designers @blizzz

[LukasReschke]

That's not a bug but a new feature ;)

[MariusBluem]

Well... Then we should move to Nextcloud 11, right 😁

[LukasReschke]

Yep. See also #796 (comment) for why this wasn't done. This requires quite a bit of work :)

[jancborchardt]

Putting to high priority and assigning @blizzz since this is a UX regression. :\ cc @karlitschek in the future we should really not do last minute stuff like this, it always has unexpected impact.