Certain properties (e.g. altLabel) are not part of the `properties` parameter when fetching concept data

[stefandesu]

For example, BK 50.31 has several alternative labels that are used for the search, but not shown under "labels". Looking at the network tab, we can see that altLabel is not part of the properties parameter when requesting concept data.

Either we need to completely remove the properties parameter (without it, alternative labels are returned), or add more properties to the field.

[stefandesu]

I have discovered multiple things about the properties parameter when using the DANTE API:

• There's additional syntax for that parameter which can be very helpful.
  • See DANTE API docs
  • JSKOS Server should at least support parsing this syntax, even if the implementation slightly differs: https://github.com/gbv/jskos-server/issues/160
  • Adding + as a prefix returns all default properties plus additional properties which is exactly what we need.
• There are also other properties that are not returned by default which we want (scopeNote and editorialNote in particular), so I have now adjusted the default value for the properties parameter to +created,issued,modified,editorialNote,scopeNote.