GF-45640: Allow scroller settings to be overridden by subclass/instance.  Particularly, we want to allow opting to "scroll" instead of "auto", to force scroll bars on if needed.
DCO-1.1-Signed-Off-By: Kevin Schaaf <kevin.schaaf@lge.com>
Merge pull request #554 from enyojs/GF-45640-kevinpschaaf

GF-45640: Allow scroller settings to be overridden by subclass/instance....

This is correct!

Reviewed-By: Cole Davis (cole.davis@lge.com)