Keep the time when selecting a different day

[fweinaug]

Currently, when selecting a different day in the 'single' mode the time is always reset to 00:00. It would be great to have a way to keep the time, e.g. when building a DateTimePicker.

To reproduce: See this example and select a day and time other than 00:00. When you now select a different day the time will reset to 00:00.

[vbro1293]

Agreed, this would be really good to get added in if possible please