Fixes CMB-1323

## Issue
IntegerPicker formats padded negative numbers with the negative sign in the middle and includes the negative sign in the count of number of digits. (e.g. 00-1 instead of -0001)

## Fix
Prepend digits based on absolute value and prepend negative sign

Enyo-DCO-1.1-Signed-off-by: Ryan Duffy <ryan.duffy@lge.com>