GF:1345: Fixes for Date/TimePicker: Fix for GF-1784 resulted in no onChange event being fired (which breaks any users such as Date/TimePicker.  Fire them from the prev/next functions.
GF:1345: Fixes for Date/TimePicker: Fix for GF-1784 resulted in no onChange event being fired (which breaks any users such as Date/TimePicker.  Fire them from the prev/next functions.

Enyo-DCO-1.1-Signed-off-by: Kevin Schaaf <kevin.schaaf@lge.com>

mcanthony/moonstone,mcanthony/moonstone,enyojs/moonstone,mcanthony/moonstone