Explicitly trigger the change event on the source
Explicitly trigger the change event on the source

The Backbone view event handlers were not picking up when the graphic
layout selection widget was changing the underlying select element. The
change event needs to be manually triggered because changing the selected
element with attr() doesn't cause this to happen.

denverfoundation/storybase,denverfoundation/storybase,denverfoundation/storybase,denverfoundation/storybase