DataSet -> Dataset

Resource DataSet was renamed from DataSet to Dataset [here](https://github.com/lukecampbell/ion-definitions/blob/a3eb2cf9ef02bba361c87aa6b2db80c74ad22f7d/objects/data/dm/dataset.yml#L2)

Changes:

```diff
diff --git a/static/js/ux-views-datatable.js b/static/js/ux-views-datatable.js
index 3ab2a22..f8403fd 100644
--- a/static/js/ux-views-datatable.js
+++ b/static/js/ux-views-datatable.js
@@ -197,7 +197,7 @@ IONUX.Views.DataTable = IONUX.Views.Base.extend({
             case "DataProducer":
                 var type_css = 'data_producer_mini';
                 break;
-            case "DataSet":
+            case "Dataset":
                 var type_css = 'data_set_mini';
                 break;
             case "Deployment":
```