Pulling columns logic out into its own services/controller in a new indexUtils module

spec/javascripts/unit/admin/index_utils/services/columns.js.coffee

@@ -0,0 +1,15 @@
+describe "Columns service", ->
+  Columns = null
+
+  beforeEach ->
+    module 'admin.indexUtils'
+
+    inject (_Columns_) ->
+      Columns = _Columns_
+
+    Columns.columns = ["something"]
+
+  describe "setting columns", ->
+    it "sets resets @columns and copies each column of the provided object across", ->
+      Columns.setColumns({ name: { visible: true } })
+      expect(Columns.columns).toEqual { name: { visible: true } }