Command queue

New: Adding multiple series will queue them instead of running all at once
New: Slower scheduled tasks won't be block others from running

src/UI/Commands/CommandController.js

@@ -74,7 +74,7 @@ var singleton = function() {
                 return;
             }
 
-            model.bind('change:state', function(model) {
+            model.bind('change:status', function(model) {
                 if (!model.isActive()) {
                     options.element.stopSpin();