Fixed double escaping of dashboard query parameters

frontend/src/metabase/dashboard/components/Dashboard.jsx

@@ -139,7 +139,7 @@ export default class Dashboard extends Component {
                 .map((value, id) => ([_.findWhere(parameters, { id }), value]))
                 .filter(([param, value]) => (param && value))
                 .reduce((params, [param, value]) => ({ ...params,
-                    [encodeURIComponent(param.slug)]: encodeURIComponent(value)
+                    [param.slug]: value
                 }), {})
                 .value();