Fix cancel and restart buttons

Callback functions for restart and cancel where improperly updated while
switching from coffeescript to javascript.

app/utils/repo-actions-item-component-mixin.js

@@ -29,9 +29,7 @@ export default Ember.Mixin.create({
       }
       this.set('restarting', true);
       onFinished = () => {
-        return function() {
-          return this.set('restarting', false);
-        };
+        this.set('restarting', false);
       };
       return this.get('item').restart().then(onFinished, onFinished);
     },
@@ -41,31 +39,28 @@ export default Ember.Mixin.create({
         return;
       }
       this.set('cancelling', true);
+
       type = this.get('type');
       return this.get('item').cancel().then(() => {
-        return function() {
-          this.set('cancelling', false);
+        this.set('cancelling', false);
+        return Travis.flash({
+          success: (type.capitalize()) + " has been successfully canceled."
+        });
+      }, (xhr) => {
+        this.set('cancelling', false);
+        if (xhr.status === 422) {
+          return Travis.flash({
+            error: "This " + type + " can't be canceled"
+          });
+        } else if (xhr.status === 403) {
+          return Travis.flash({
+            error: "You don't have sufficient access to cancel this " + type
+          });
+        } else {
           return Travis.flash({
-            success: (type.capitalize()) + " has been successfully canceled."
+            error: "An error occured when canceling the " + type
           });
-        };
-      }, () => {
-        return function(xhr) {
-          this.set('cancelling', false);
-          if (xhr.status === 422) {
-            return Travis.flash({
-              error: "This " + type + " can't be canceled"
-            });
-          } else if (xhr.status === 403) {
-            return Travis.flash({
-              error: "You don't have sufficient access to cancel this " + type
-            });
-          } else {
-            return Travis.flash({
-              error: "An error occured when canceling the " + type
-            });
-          }
-        };
+        }
       });
     }
   }