ENYO-246: IntegerPickers now maintain their correct height and position.

### Cause
The IntegerPickers were becoming misaligned because of an incorrect height calculation done by older webkit.

### Fix
IntegerPickers, being inline elements, must have a `vertical-align` property set to remain vertically aligned with each other.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>