copy labels when moving cards between boards

[grnd-alt]

• Target version: main

Summary

labels assigned to cards that move between boards now get cloned old json deck files that have cross referencing labels now skip those labels instead of throwing an error

Checklist

• [ ] Code is properly formatted
• [ ] Sign-off message is added to all commits
• [ ] Tests (unit, integration, api and/or acceptance) are included
• [ ] Documentation (manuals or wiki) has been updated or is not required

[stefan-niedermann]

I did a quick code review and I am wondering whether or not there should be permission check (I think the "manage board" permission is required when a user wants to create new labels)?

[juliusknorr]

@grnd-alt Backports?

[grnd-alt]

/backport to stable28

[grnd-alt]

/backport to stable29

[grnd-alt]

/backport to stable30