Problem description: When creating a service period for a service, it is not possible to create a service uptime/downtime that would end on Sunday and start on any other day of the week (except Sunday). The following error is returned in this case: "Service start time must be less than end time."
Furthermore, it is not possible to create a service period that would start during one week and end during the other week, for example, a period that would start on Friday evening and end on Monday early in the morning.

Steps to reproduce:

1. Navigate to Configuration => Services
2. Click "Add child" on any of the existing services
3. In the opened Service configuration view navigate to "Time" tab
4. Attempt to create an uptime/downtime service period that starts on Tuesday and ends on Sunday.

Result: Service time is not added, the following error is returned: Service start time must be less than end time

Expected: It should be possible to create sush service periods.

Example: