Select time range will not be highlighted if only click the cell in Month Calendar

Hi,

Seems in month calendar, if only click a cell (not drag before mouse up), it will be triggered from onTimeRangeSelected, but the UI is not highlighted. However, if drag over the cell a bit, the cell will be highlighted. But this problem won't happen in Scheduler.
So I think it will confuse our clients, which clicking a date, the date has been updated, but no highlighting on the cell.