Fixes BHV-15490

## Issue
`enyo.dom.getAbsoluteBounds()` was using the style property to retrieve the value of the CSS transform which returns the explicit value set (e.g. the percentage), not the calculated value. Furthermore, it did not account for `matrix` transforms, only `translateX`, `translateY`, and `matrix3d`.

## Fix
Use enyo.dom.getComputedStyle and account for matrix transforms in getAbsoluteBounds

Enyo-DCO-1.1-Signed-off-by: Ryan Duffy (ryan.duffy@lge.com)