role/audit: Use role-audit as id instead of role/audit

Since HTML5 nearly any char is allowed in ids, including the slash,
but jQuery doesn't support the slash as part of css selectors...

application/controllers/RoleController.php

@@ -239,7 +239,7 @@ class RoleController extends AuthBackendController
         $this->addControl($header);
         $this->addContent(
             (new PrivilegeAudit($chosenRole !== null ? [$chosenRole] : $assignedRoles))
-                ->addAttributes(['id' => 'role/audit'])
+                ->addAttributes(['id' => 'role-audit'])
         );
     }