ENYO-1481: allow to auto scroll in the component view when an item is se...

...lected in the iframe

Related JIRA: https://enyojs.atlassian.net/browse/ENYO-1481 

Tested on W7, Chrome, FF.

Enyo-DCO-1.1-Signed-off-by: Olga Popova <olga.popova@hp.com>