The setup / definition of maintenance periods is rather unintuitive

• Maintenance shows "active since" & "active till". This should be related to the periods defined in the next tab; e.g. if a period runs from 1/1 - 4/1, then there should (at least) be a warning, if  "active till" ends before 4/1.
• Periods itself should show start & stop of the period. In the attached screenshot, what does Schedule = 2021-06-21 10:37 and Period 1d mean? 2021-06-21 00:00 - 2021-06-21 23:59 or 2021-06-21 10:37 - 2021-06-22 10:37?