Fix nuxeo-path-suggestion displaying as invalid on initial input

Steps to reproduce:

1. In Studio > Modeler > Page Providers, create a Page Provider with a predicate on ecm:path using STARTSWITH
2. In Studio > Designer > Layouts > Page Providers, configure its search-form.html to use a <nuxeo-path-suggestion> element for ecm:path. Configure a default search-results.html form.
3. Configure a Tab and Drawer to use the configured search-form.html.
4. After Studio project load in a local instance, navigate to the respective Drawer Item and Tab in Web UI.
5. When inputting a valid path in the <nuxeo-path-suggestion> elements, a red underline is shown by default, indicating invalid input. The red underline disappears following page refresh and validation functionality is normal.
   (Expected: no red underline on initial valid path construction).

Attaching a screenshot of a Drawer Item and Tab configured in my local instance that demonstrates the behavior.