BHV-13458: Update DatePicker to properly handle locale changes, both before and after having a value set.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Merge pull request #1608 from enyojs/BHV-13458-aarontam

BHV-13458: Update DatePicker to properly handle locale changes, both before and after having a value set.

Reviewed-By: Cole Davis (cole.davis@lge.com)