ENYO-1921: Replaced home-made date picker with generic name picker based on FlyweightPicker kind.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Merge pull request #191 from enyojs/ENYO-1921-aarontam

ENYO-1921: Replaced home-made date picker with generic name picker based on FlyweightPicker kind.

Reviewed-By: Ben Combee (ben.combee@lge.com)