Parallelize delete

lib/shared/addon/components/confirm-delete/component.js

@@ -26,17 +26,28 @@ export default Component.extend(ModalBase, {
 
   actions: {
     confirm: function() {
-      this.get('resources').forEach((resource) => {
+      const resources = this.get('resources').slice().reverse();
+      async.eachLimit(resources, 5, function(resource, cb) {
+        if ( !resource ) {
+          return cb();
+        }
+
         if ( resource.cb ) {
-          resource.cb();
+          const out = resource.cb();
+          if ( out && out.finally ) {
+            out.finally(cb);
+          } else {
+            cb();
+          }
+
+          return;
         } else {
-          resource.delete();
+          resource.delete().finally(cb);
         }
       });
 
       this.send('cancel');
     },
-
   },
 
   isEnvironment: computed('resources', function() {