Search: add information if element is used as placeholder to manage search

[CFuerstenau]

Is there an existing issue for this?

• I searched for a similar issue and didn't find a suitable one.

What is your improvement proposal all about?

As a data manager I want to improve the tile view of the search or want to see which Attributes are used in the tile view.
I would be nice to see the used attributes under "manage datasets"

How does the current implementation works and what is wrong about it?

in the overview I don't see if the attribute is used for the tile view

How should the (part of the) feature be implemented?