Linked items: Collection entry must contain a "name"-field

[Der-K-2000]

If you don't have a field with the key "name", there will be only the relative link to a connected page in the sidebar of "linked items". That could be quite confusing, especially with a lot of linked pages.

One solution to avoid this bug could be to add a new field to the collection-settings which points to a custom name field. (similar to the sort-field)