scrolling through date and time selections (RM#5790)

[adam-iris]

ported from Redmine #5790 (created 2017-03-17)

The Date and Hour/Minute/Second entries in the starttime and endtime fields currently allow for "scrolling" between a maximum and minimum number using the keypad. It would be ideal, but not critical, if these numbers looped over back to the minimum once the maximum was reached. So, for seconds, instead of getting stuck at 59, it would scroll from 57, 58, 59, 00, 01, and so on.