[FIX] Unintended "Reply on thread" button showing on thread's first message

[Educg550]

Proposed changes (including videos or screenshots)

Referent to TC-128

Before:

After:

Issue(s)

Steps to test or reproduce

Open a new channel, then:

1. Send any message
2. Click "Reply in thread" button and send a message in thread to that message
3. You'll see that the button "Reply in thread" won't show anymore for the top message, avoiding "thread nesting" and limiting it to only 1 thread, as it should be
4. Also any other messages sent in that thread won't be allowed to create another inside it

Further comments

As flagged in comment on that issue, seems that there was a discussion whether the thread should open again or have a new created one when clicking on such unintended button. That said, it's conclusive to say that there was no point on opening a new thread for the top message when you're already on one, same for opening new threads for further messages.

[codecov]

Codecov Report

Merging #27716 (dfc490e) into develop (689ee20) will increase coverage by 0.94%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop   #27716      +/-   ##
===========================================
+ Coverage    41.93%   42.88%   +0.94%     
===========================================
  Files          845      818      -27     
  Lines        17799    17282     -517     
  Branches      2019     1944      -75     
===========================================
- Hits          7464     7411      -53     
+ Misses       10069     9607     -462     
+ Partials       266      264       -2     

Flag	Coverage Δ
e2e	42.88% <ø> (+0.94%)	⬆️

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[hugocostadev]

Hi @Educg550 we have a method called isThreadMainMessage, maybe you can use it to add the correct context and differentiate in other way in the MessageList without creating additional property