ENYO-577: Fix backward-compatibility for deprecated uppercase properties.

### Issue
We had made a change to use a consistently-named property `uppercase` to control the uppercasing of certain controls. Previously, this had been implemented with various property names and those have since been deprecated. This resulted in some incompatibilities with using the older property names.

### Fix
We add some glue code to properly utilize the deprecated property values when determining whether or not we should be uppercasing the control.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>