setEndTime and setStartTime not replacing manually set time

[nt294]

Describe the bug
If you manually set the time on the picker using the dropdown menu, calling picker.setStartTime or picker.setEndTime will not override what has been selected while the picker is open.

To Reproduce
Steps to reproduce the behavior:

1. Create a picker with the Range, Time and Preset plugins
2. Open the picker and manually change the time using the dropdown menu
3. Call picker.setStartTime or picker.setEndTime (I am listening for a click event on a preset button to do this, as per PresetPlugin with TimePlugin activated does not support setting times #80, but it doesn't seem to matter from where its called)

Expected behavior
picker.setStartTime or picker.setEndTime will trigger, but will not update the display; only closing and reopening the picker causes the selected time to change.