GF-58382: Dispatch all key events via Signals, regardless of input focus state.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Merge pull request #631 from enyojs/GF-58382-aarontam

GF-58382: Dispatch all key events via Signals, regardless of input focus state

Reviewed-By: Ben Combee (ben.combee@lge.com)