enable use of radiobuttonlist pre editor

src/Umbraco.Web.UI.Client/src/common/services/datatypehelper.service.js

@@ -18,7 +18,8 @@ function dataTypeHelper() {
                     description: preVals[i].description,
                     label: preVals[i].label,
                     view: preVals[i].view,
-                    value: preVals[i].value
+                    value: preVals[i].value,
+                    prevalues: preVals[i].prevalues
                 });
             }
 

src/Umbraco.Web.UI.Client/src/views/datatypes/datatype.edit.controller.js

@@ -29,6 +29,7 @@ function DataTypeEditController($scope, $routeParams, $location, appState, navig
                 view: preVals[i].view,
                 value: preVals[i].value,
                 config: preVals[i].config,
+                prevalues: preVals[i].prevalues
             });
         }
     }