fix permissions editor missing scroll (#17595)

frontend/src/metabase/admin/permissions/components/PermissionsEditor/PermissionsEditor.styled.js

@@ -2,4 +2,5 @@ import styled from "styled-components";
 
 export const PermissionsEditorRoot = styled.div`
   flex-grow: 1;
+  overflow: auto;
 `;