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

Issue
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Key events are not sent via `Signals` when triggered from a focused input control. Certain keys need to be handled regardless of input focused state.

Fix
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All key events will now be sent via `Signals`. Additionally, an extraneous parameter has been removed in the call to `findDefaultTarget`.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>