BHV-8502: In enyo.Popup, make eventsToCapture a concat'able property.

Doing this because we now have two different cases in Moonstone where subkinds of enyo.Popup need to capture additional events.

Making enyo.Popup noDefer: true so that we can add the required concat() method to its constructor.

Enyo-DCO-1.1-Signed-Off-By: Gray Norton (gray.norton@lge.com)
Merge pull request #749 from enyojs/BHV-8502-graynorton

BHV-8502: In enyo.Popup, make eventsToCapture a concat'able property.
ensure bindings have a way of being reset and rebuilt arbitrarily

Enyo-DCO-1.1-Signed-Off-By: Cole Davis (cole.davis@lge.com)
attempt to observe changes to the 'to' path even when oneWay is true for Binding; keep ObserverChains from being created for paths of the form '$.property' as this should be treated as a single property and not a path

Enyo-DCO-1.1-Signed-Off-By: Cole Davis (cole.davis@lge.com)
Merge pull request #753 from enyojs/BHV-9346-coledavis

Fix for: BHV-9346

Reviewed-by: Aaron Tam (aaron.tam@lge.com)