fix: remove blocks when updating an old message

[reinaldonetof]

Proposed changes

With the implementation of the alert when a user is mentioned and is not in the channel, a bug appeared where, after pressing the action button, these buttons are not hidden.

Issue(s)

How to test or reproduce

• Go to a channel where you are an owner, leader or moderator
• Mention someone outside the channel
• It will appear some buttons as "add them", "do nothing" or "let them know"
• After you press the buttons, this message will be updated and the buttons will hide.

Screenshots

Before

Screen.Recording.2024-01-29.at.11.19.02.mov

After

Screen.Recording.2024-01-29.at.11.17.19.mov

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Documentation update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Further comments

TC-1092