fix missing sender in answer mode if open mail from dashboard

What does this MR do?

When replying to mails, the sender is not copied.... so the sender field is empty and must be selected manually. Behavior is only on beta Behavior is only when opening a mail from the dashboard, then click on REPLY. The sender is then missing

How confident are you it won't break things if deployed?

Links to related issues

https://yunity.slack.com/archives/C04GW9SBV5H/p1711398845758399

How to test

Screenshots (if applicable)

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• set a "for:" label to indicate who will be affected by this change
• set the "API change" label if changes in the API are not backward compatible
• added to the next milestone (see https://gitlab.com/foodsharing-dev/foodsharing/-/milestones, unless it has a "for:Dev" label)
• added an entry to CHANGELOG.md
• added a short text in the release notes to /release-notes/YYYY-MM.md
• Once your MR has been merged, you are responsible to create a testing issue in the Beta Testing forum: https://foodsharing.de/region?bid=734&sub=forum. Please change the MRs label to "state:Beta testing".
  • Consider writing a detailed description in German.
  • Describe in a few sentences, what should be tested from a user perspective.
  • Also mention different settings (e.g. different browsers, roles, ...) how this change can be tested.
  • Be aware, that also non technical people should understand.