fix: Show not inline files

[lebojo]

Display non inline attachments files even with contentId

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Found 0 unused code occurences

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* No unused code detected.

[PhilippeWeidmann]

This is a computed property so this will be on the main thread.

What we should do is do this computation once when we get the message here: MailboxManager+Message.swift:26 (and also update the corresponding thread)