ENYO-2697:  add event click on the panels

First step to https://enyojs.atlassian.net/browse/ENYO-2697

Tested on Windows 7, FF, Opera, IE10, IE9, Safari, Chrome, Chrome Canary

Enyo-DCO-1.1-Signed-off-by: Olga Popova <olga.popova@hp.com>