Create custom fields creation UI added to Board Menu, Model in progress

client/components/activities/activities.js

@@ -91,6 +91,11 @@ BlazeComponent.extendComponent({
     }, attachment.name()));
   },
 
+  customField() {
+    const customField = this.currentData().customFieldId;
+    return customField;
+  },
+
   events() {
     return [{
       // XXX We should use Popup.afterConfirmation here