Add required option to Labels tag #8869
Description
Is your feature request related to a problem? Please describe.
I would like to enforce annotators to always highlight a region in the text using one of the labels in my tag. This is not possible at the moment, because this option is not available for the Labels tag.
Describe the solution you'd like
I would like to see the attribute "required" added to the labels tag, which checks whether the annotator selected at least one region in the text, and otherwise gives a popup when the annotator clicks on "submit".
Describe alternatives you've considered
I am now either accepting that my data does not get labelled, or need to add a complex set of rules across multiple Views, Choices, and Labels tags. (e.g., a View with visible when "no-region-selected", containing a required choice that adds a control question. However, users can still ignore this reminder.)