Settings saving feedback

app/assets/javascripts/supplier/app/controllers/settings_controller.js.coffee

@@ -3,7 +3,9 @@ App.SettingsController = Ember.ObjectController.extend
   # model: (-> @get('controllers.application.supplier')).property('controllers.application.supplier')
   time_zones: (-> window.time_zones ).property()
   countries: (-> window.countries ).property()
+  saving: false
   editIensProfile: (-> @get('model.country') is 'Netherlands' ).property('model.country')
   actions:
     saveSettings: ->
-      @get('model').save()
+      @set 'saving', true
+      @get('model').save().then (supplier) => @set 'saving', false

app/assets/javascripts/supplier/app/models/product_order.js.coffee

@@ -2,7 +2,7 @@ attr = DS.attr
 App.ProductOrder = DS.Model.extend
   quantity: attr 'number', defaultValue: 1
   price: attr 'number'
-  product: DS.belongsTo('product')
+  product: DS.belongsTo('product', async: true)
   order: DS.belongsTo('order')
   increment: ->
     @set('quantity', @get('quantity') + 1)

app/assets/javascripts/supplier/app/templates/settings.emblem

@@ -37,4 +37,9 @@ if editIensProfile
       = image_tag 'supplier/settings/iens-example.png'
       span=t "settings.reviews.explanation"
 .form-row.form-actions
-  button.button.submit-supplier-settings{action 'saveSettings'}=t 'settings.save'
+  if saving
+    button.button.submit-supplier-settings.disabled
+      = t 'settings.save'
+      span.fa.fa-lg.fa-spinner.fa-spin
+  else
+    button.button.submit-supplier-settings{action 'saveSettings'}=t 'settings.save'