Additional entity info for KB features
Is your feature request related to a problem? Please describe. When an annotation is linked to a KB entity, it would sometimes be useful to see some specific information from the KB on the annotation screen. E.g. when linking a location, the user might want to be able to see the geographical coordinates on the annotation screen.
Describe the solution you'd like Allow the user to specify one or more properties (or property paths) which are used to retrieve additional information on a linked entity and show this information in the popover/under the feature editor.
Describe alternatives you've considered
Instead of just displaying the information, one could also consider to implement automatic features. I.e. the features long and lat could be set based on the value of some feature locationIri. However, this seems to be more complex as it introduces dependencies between features.