Improve autocomplete UI

I created a merge request where the “throbber” icons have been replaced with Claro’s magnifying glass icons. I also updated the helper text in an attempt to add clarity.

Attaching a patch generated from this merge request.

Updated patch after fixing test.

Composer choked on patch generated from issue fork. Attaching new one that composer liked which was generated using patch utility.

📌 Implement js- prefix for linkit textfields to separate JavaScript behavior from styling Needs review essentially does the same, but without duplicating Claro CSS