BHV-14565: Remove documentation from onShouldDrag event, re-add event data for WebService onProgress event.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
BHV-14565: Streamline event data included with events.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
BHV-14565: Correcting a copy/paste typo and using the correct object.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
BHV-14565: Preserve the current mechanism to allow nested scrollers to behave properly.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>