[CIS-1096] Fix an issue for ChatThreadVC opened from a deeplink

[dmigach]

...when new replies are only added to the main chat, but not to the replies thread

The fix makes sure that we set thread message to the ComposerVC after synchronize executes. There is still an edge case for really fast users with really slow connection though 🙂
Before merging this we need to run it by Oscar

[codecov-commenter]

Codecov Report

Merging #1354 (c94f096) into main (e657a92) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1354      +/-   ##
==========================================
+ Coverage   90.75%   90.77%   +0.02%     
==========================================
  Files         224      224              
  Lines        9800     9800              
==========================================
+ Hits         8894     8896       +2     
+ Misses        906      904       -2     

Flag	Coverage Δ
llc-tests	90.77% <ø> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
...ocketClient/Engine/URLSessionWebSocketEngine.swift	62.50% <0.00%> (+4.16%)	⬆️

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