One day added each time you drag and drop an All Day event to another date

[ane-gabriela]

Steps to reproduce:

1. In a calendar create a new event with All Day ticked e.g. Start Date 24.07.2018 00:00
2. Click Save
3. Drag and drop the event from the calendar to another day e.g. 25
4. Observe the result

Expected results: The event is moved to the required date.

Actual results: The event is moved to the required date but it also adds another day. Instead of moving the event to the date of 25, it moved the event to 25 and 26. Each time you move the event it keeps on adding another day.

Environment: Windows 10, XWiki 10.5 with MySQL 5.7 and Edge 17

Linked to: https://jira.xwiki.org/browse/MOCCACAL-114