Load config explicitly and remove setup routine of settings component

[christianlupus]

Topic and Scope

This is a first step to prevent regular updating of the config on each page reload.

Closes #1752

Concerns/issues

The PR just covers the basic changes. The migration to the InitialState is not yet carried out.

Formal requirements

There are some formal requirements that should be satisfied. Please mark those by checking the corresponding box.

• I did check that the app can still be opened and does not throw any browser logs
• I created tests for newly added PHP code (check this if no PHP changes were made)
• I updated the OpenAPI specs and added an entry to the API changelog (check if API was not modified)
• I notified the matrix channel if I introduced an API change

[codecov]

Codecov Report

Merging #1892 (c31af11) into master (9bbeb0c) will not change coverage.
Report is 11 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1892   +/-   ##
=======================================
  Coverage   79.55%   79.55%           
=======================================
  Files          89       89           
  Lines        2582     2582           
=======================================
  Hits         2054     2054           
  Misses        528      528           

Flag	Coverage Δ
integration	21.99% <ø> (ø)
migration	5.84% <ø> (ø)
unittests	55.96% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[github-actions]

Test Results

     27 files  1 242 suites   5m 45s ⏱️
   510 tests    510 ✔️ 0 💤 0 ❌
4 590 runs  4 589 ✔️ 1 💤 0 ❌

Results for commit 185fb32.

[seyfeb]

Except for the two minor points it looks fine to me.