[stable12] Fix loading icon position in the app menu

[juliusknorr]

Backport of #7271

Before:

After:

[codecov]

Codecov Report

Merging #7457 into stable12 will increase coverage by 0.01%.
The diff coverage is n/a.

@@              Coverage Diff               @@
##             stable12    #7457      +/-   ##
==============================================
+ Coverage       53.92%   53.94%   +0.01%     
- Complexity      22701    22705       +4     
==============================================
  Files            1384     1384              
  Lines           86955    87009      +54     
  Branches         1330     1330              
==============================================
+ Hits            46889    46935      +46     
- Misses          40066    40074       +8

Impacted Files	Coverage Δ	Complexity Δ
lib/private/Server.php	84.8% <0%> (+0.12%)	121% <0%> (ø)	⬇️
core/js/js.js	61.94% <0%> (+0.66%)	0% <0%> (ø)	⬇️
lib/private/Files/Cache/Propagator.php	96.2% <0%> (+1.26%)	16% <0%> (ø)	⬇️
apps/files_trashbin/lib/Expiration.php	91.93% <0%> (+1.61%)	29% <0%> (ø)	⬇️
lib/private/Settings/Manager.php	50.23% <0%> (+6.05%)	48% <0%> (+4%)	⬆️