STEPS TO REPRODUCE
- Go to Drawer > Page Index
- Click on Date filter box
- Select Custom Range
- Observe the time displayed on the drop-boxes (hour/minutes) and (eventually) change the time
Time is properly displayed in the drop-down boxes (hours/minutes can be seen entirely).
Only part of the hours/minutes can be seen. This reproduces on IE11, Chrome 73, Edge 18, Firefox 66 and also on previous XWiki versions (tested on 10.8.3).