[FIX] Set default value "false" for global search.

[ivan1kazantsev]

Proposed changes (including videos or screenshots)

If we disable the "global search", then the "global search" checkbox removes from the UI. It's not what we want. I think, we should set the default to "false", because the default is to search inside the channel/dialog.

Issue(s)

Fixes: #20595

Steps to test or reproduce

1. Enable the "global search" in admin settings.
2. Go to channel or dialog.
3. Use search and be happy.

[CLAassistant]

All committers have signed the CLA.

[wreiske]

I just did this in my local build because this has been so incredibly painful for us... Went to go push a PR and found this one. Can we get this merged, please?

[codecov[bot]]

Codecov Report

Merging #25568 (6be922c) into develop (12cd58e) will decrease coverage by 0.89%. The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop   #25568      +/-   ##
===========================================
- Coverage    41.25%   40.35%   -0.90%     
===========================================
  Files          817      845      +28     
  Lines        17881    18378     +497     
  Branches      1988     2052      +64     
===========================================
+ Hits          7376     7416      +40     
- Misses       10220    10678     +458     
+ Partials       285      284       -1     

Flag	Coverage Δ
e2e	40.35% <0.00%> (-0.90%)	:arrow_down:

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[vinogradovia]

#21659