Account for fractional pixels when performing percentage transformations.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Merge pull request #1860 from enyojs/fix-SimplePickerRounding-aarontam

Account for fractional pixels when performing percentage transformations.

Integrated-By: Aaron Tam (aaron.tam@lge.com)