Push-out confirmation after freeing slots in Schedule block.

Steps:
1. Create a new Landing Page.
2. Add a Schedule block.
3. Change template to list.
4. Add 4 different content items (4/4, e.g. Places).
5. Remove 2 (without leaving Edit mode).
6. Add a 5th different content item.
Actual: Push-out confirmation is displayed for the oldest item.
Expected: 5th item is added into one of the freed slots.