Steps to reproduce:
1. Apply https://opencast.jira.com/browse/MH-13312
2. Start adding a new scheduled events that generates scheduling conflicts and quit the Add Event Wizard by left-clicking the 'x'
3. Start adding a new scheduled event that generates a conflict
The conflict notification is not displayed anymore (the table listing the conflicts is displayed)
The conflict should be displayed
Workaround (if any):