App content list fixes

[skjnldsv]

Since I'm an idiot, I haven't implemented the proper scrolling of the app list... 🙈
You can test this with nextcloud/contacts#438 and make two birds with one stone by reviewing both 😝

[codecov]

Codecov Report

Merging #7431 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #7431 +/- ##
============================================
+ Coverage 51.08% 51.08% +<.01% - Complexity 24858 24865 +7 
============================================
Files 1596 1596 Lines 94590 94608 +18 Branches 1367 1367 ============================================
+ Hits 48317 48335 +18 
Misses 46273 46273

Impacted Files	Coverage Δ	Complexity Δ
lib/private/Files/Node/HookConnector.php	94.59% <0%> (-1.36%)	19% <0%> (ø)
lib/private/Security/CertificateManager.php	91.08% <0%> (-1%)	39% <0%> (ø)
apps/files_trashbin/lib/Trashbin.php	72.28% <0%> (-0.25%)	136% <0%> (ø)
lib/private/Files/Filesystem.php	69.66% <0%> (ø)	120% <0%> (ø)	⬇️
lib/private/Server.php	82.04% <0%> (+0.06%)	133% <0%> (+5%)	⬆️
lib/private/legacy/util.php	58.34% <0%> (+0.16%)	230% <0%> (ø)	⬇️
lib/private/Files/View.php	84.38% <0%> (+0.16%)	373% <0%> (+2%)	⬆️
lib/private/Files/Cache/Propagator.php	96.2% <0%> (+1.26%)	16% <0%> (ø)	⬇️
lib/private/AvatarManager.php	71.42% <0%> (+9.52%)	4% <0%> (ø)	⬇️

[MorrisJobke]

Rebased to check if CI runs fine.

[MorrisJobke]

Tested and works - even in Edge and IE11 😉

[skjnldsv]

Wait before merging

EDIT: GO GO GO

[rullzer]

Seems to do the trick

[skjnldsv]

🙇

[jancborchardt]

Good stuff @skjnldsv! :) (Am currently crawling through issues after the week vacation :D)