display name fix for thunderbird

[avinash-0007]

• Resolves: # https://github.com/nextcloud/calendar/issues/4784

Summary

TODO

• [ ] ...

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• [ ] Tests (unit, integration, api and/or acceptance) are included
• [ ] Screenshots before/after for front-end changes
• [ ] Documentation (manuals or wiki) has been updated or is not required
• [ ] Backports requested where applicable (ex: critical bugfixes)

[tcitworld]

It's odd we should have to do this. :thinking:

[avinash-0007]

@tcitworld i checked this and the case is display name is blank in case of thunderbird mail client.

[OlexTratisky]

This issue is really frustrating , is it solved?

[AndyScherzinger]

@ChristophWurst what do you think? Also cc @sorbaugh since it touches the server code base.