### Steps to reproduce

Begin of the deletion _Please write down the steps to reproduce. Try to write down all necessary preconditions (what permissions do you have, are other users involved?). Example:_

End of the deletion 1. Begin of the insertionIn work packages list, open the "configure view" modal from the menu
2. End of the insertion Navigate to highlighting tab of work package Begin of the insertionconfigure viewEnd of the insertion modal.
Begin of the insertion3.End of the insertion Begin of the deletion 2.End of the deletion Remove selection for all inline highlightable attributes.

### What is the buggy behavior?

Begin of the deletion _Please describe the bug with as most details as possible. Example:_

End of the deletion * The multi select box is now empty and the expected behaviour would be to not have any attributes highlighted. In fact, all attributes are highlighted. The feature set makes total sense, since we have a separate option to disable highlighting entirely.

### What is the expected behavior?

Begin of the deletion _Describe how the application should behave like. Example:_

End of the deletion 1. Display "All attributes highlighted" as a placeholder in the multi select box. Begin of the deletion
2. An email should have been sent to that userEnd of the deletion

**OpenProject version**

v12.4.0

**Browser**

* [ ] Chrome
* [x] Firefox
* [x] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)