Configure special use mailbox when not set

[hamza221]

Steps to reproduce

Have no special use mailboxes configured

1. Send a message -> fix no sent mailbox configured #8311
2. Save to draft
3. delete a message

Expected behavior

Create or set an existing special use mailbox

Actual behavior

No sent mailbox -> #4153
To be investigated

Mail app version

No response

Nextcloud version

No response

Mailserver or service

No response

Operating system

No response

PHP engine version

None

Nextcloud memory caching

No response

Web server

None

Database

None

Additional info

No response