Required Field for Labels

[imaginaryBuddy]

Is your feature request related to a problem? Please describe.
When I create a Polygon Label, I want that it to be labelled with the tag name, and this should be a required field. For now, I can't set it to required, and I am allowed to "deselect" the tag for a particular label, which is not ideal.

Describe the solution you'd like
I would like to have a required parameter for Labels

Describe alternatives you've considered
None

Additional context
None