### Steps to reproduce

1. Login to QA Begin of the insertionEdgeEnd of the insertion Begin of the deletion Edge End of the deletion
2. Have 2 WP with predecessor-follower relation and set dates on them so that follower starts the next day after predecessor finishes
3. Go to the follower WP and open date picker
4. Observe the dates which precede the start date of the follower -> they are disabled as they belong to Begin of the insertionpredecessorEnd of the insertion Begin of the deletion predecessor End of the deletion
5. Switch off Working days only

### What is the buggy behavior?

* The dates of the predecessor become clickable and available to choose for the following work Begin of the insertionpackage.
* Switching it back on does not revert it; it maintains the previously unavailable dates available.End of the insertion Begin of the deletion packageEnd of the deletion

### What is the expected behavior?

1. Switching off Begin of the insertion_WorkingEnd of the insertion Begin of the deletion WorkingEnd of the deletion days Begin of the insertiononly_End of the insertion Begin of the deletion onlyEnd of the deletion should not enable selection of dates which were disabled due to the Begin of the insertionrelation. (The switch should _only_ affect the enabled/disabled of non-working days: weekends and individual non working days).End of the insertion Begin of the deletion relationEnd of the deletion

### Environment information

**OpenProject installation type**

* [ ] Hosted cloud edition
* [ ] Packaged installation
* What distribution?
* [ ] Docker All-in-one container
* [ ] Docker-compose installation
* [x] Other (please specify): QA Edge 12.5.0