fix: close the ncselect dropdown when clicked somewhere else

[GretaD]

noticed while testing #9801
when i select a 'to' and i want to add a 'cc' the dropdown doesnt close

[GVodyanov]

Cool

[ChristophWurst]

/backport to stable3.7

[backportbot]

The backport to stable3.7 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable3.7
git pull origin stable3.7

# Create the new backport branch
git checkout -b backport/9806/stable3.7

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick d6daaef6

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/9806/stable3.7

Error: No changes found in backport branch

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.