Add test coverage for AJAX links including httpMethod

Problem/Motivation

Per 📌 Use httpMethod instead of type for AJAX get/post request property Fixed and related issues, AJAX links are under-tested, we should double check if there's any existing coverage that's been overlooked and add to it, or if not add some new coverage.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet