Use webpack to deliver jquery-ui (and use newest version)

app/assets/javascripts/application.js

@@ -22,5 +22,4 @@
 // vendor/assets
 //= require ace/ace
 //= require ace/ext-language_tools
-//= require jquery-ui.min
 //= require_tree .

app/assets/stylesheets/application.css

@@ -18,7 +18,5 @@
  * vendor/assets
  *= require font-awesome.min
  *= require google_opensans
- *= require jquery-ui.min
- *= require jquery-ui.structure.min
  *= require_tree .
 */

app/javascript/packs/application.js

@@ -18,3 +18,19 @@ window._ = _; // Publish underscore's `_` in global namespace
 // CSS
 import 'chosen-js/chosen.css';
 import 'jstree/dist/themes/default/style.min.css';
+
+// custom jquery-ui library for minimal mouse interaction support
+import 'jquery-ui/ui/widget'
+import 'jquery-ui/ui/data'
+import 'jquery-ui/ui/disable-selection'
+import 'jquery-ui/ui/scroll-parent'
+import 'jquery-ui/ui/widgets/draggable'
+import 'jquery-ui/ui/widgets/droppable'
+import 'jquery-ui/ui/widgets/resizable'
+import 'jquery-ui/ui/widgets/selectable'
+import 'jquery-ui/ui/widgets/sortable'
+import 'jquery-ui/themes/base/draggable.css'
+import 'jquery-ui/themes/base/core.css'
+import 'jquery-ui/themes/base/resizable.css'
+import 'jquery-ui/themes/base/selectable.css'
+import 'jquery-ui/themes/base/sortable.css'