Browse fact sheet hierarchies while editing relations

We've increased the accuracy of selecting the correct related fact sheets—no more guessing or long list scanning. Multi-level hierarchies of fact sheets can make it complicated to pick the one you're looking for due to long, concatenated display names from the hierarchy. Similar naming components don't make it any easier.

An additional tree view in the edit mode of relations, next to the current list view, lets you traverse, expand, and collapse hierarchies to find a match quickly and confidently. The higher hierarchy levels are always in view without limiting readability. This view is the new default when editing relations on the fact sheet details page, but can be switched back with a single click that will be remembered.

On top of that, in the standard edit mode, you can add multiple relations simultaneously without opening the previously dedicated 'edit multiple' mode.