New accordion pane for channel setter mostly working.

Causes problem in automatically opening channel selector dialog from SearcherCtrlMap controller.
Some  floundering trying to get one instantiation of StompSetupCtrl.

Probably need to move it in jade and reference one controller in two places.
Pub/Sub solving problem of getting callbacks, etc. working between channel selection from open map and channel selection from dedicated accordion pane.
Fix for Leaflet "loading" event, using ArcGIS loading util.