global custom attribute space

Hi!

It would be nice that, in an enterprise environment, you could define custom fields that are useable in multiple workspaces.

Currently we are maintaining a list of a 1000 items over 6 boards, every time we need to add more to this list, we need to change every list separately. A unified field to manage this would be more than welcome.

Alternative solution would be something akin to synced items where boards could inherit fields from one "master" board.