ENYO-3891: Allow for horizontal scrolling from mousewheel event

Issue
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One cannot scroll horizontally using the scroll wheel when the `TouchScrollStrategy` or `TranslateScrollStrategy` is utilized.

Fix
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We utilize and account for the horizontal mousewheel offset, `wheelDeltaX`.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>