Albums: Prevent accidental creation of duplicates by pressing Enter multiple times

[lastzero]

Actively pressing Enter several times in the Create/Add Album dialog can create duplicate albums with the same name:

time="2022-04-09T10:19:36Z" level=info msg="album created"
time="2022-04-09T10:19:36Z" level=info msg="9 entries added to 3bm"
time="2022-04-09T10:19:38Z" level=info msg="9 entries added to 3bm"

see https://www.reddit.com/r/photoprism/comments/tyyqom/ui_may_create_a_duplicate_named_album/

[lastzero]

Started a new preview build to test the fix:

https://docs.photoprism.app/release-notes/#development-preview