Schedule block slot action menu is misplaced after changing the zone.

Steps:
1. Create a new Landing Page with layout 1_2__1.
2. Add a Schedule block to the first zone.
3. Choose template list.
4. Add a content item.
5. Verify the position of the slot action menu. (screenshot 1) [OK]
6. Move the Schedule block to the second zone.
7. Verify the position of the slot action menu. (screenshot 2) [NOK]