Don't cast url to string if it's internally transformed again

Also, the cast encodes the url as well, for use within HTML.
This is not required if used in conjunction with ipl-html.

application/controllers/NodeController.php

@@ -136,7 +136,7 @@ class NodeController extends Controller
                         'li',
                         new Link(
                             sprintf('%s (%s.conf)', $bpName, $fileName),
-                            (string) Url::fromPath('businessprocess/process/show', ['config' => $fileName])
+                            \ipl\Web\Url::fromPath('businessprocess/process/show', ['config' => $fileName])
                         )
                     )
                 );