GF-59152: Add flag to control calling preventDefault for a captured event.

Issue
-------
The capture API is calling `preventDefault` when capturing the `down` event, but this prevents blurring of an input in a popup, which prevents the VKB from hiding.

Fix
----
Create a flag that controls whether `preventDefault` is called.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>