Add support for HTML and msgtype in ECA send message action
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3354429. -->
Reported by: [freelock](https://www.drupal.org/user/313537)
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Would like to send links to Matrix.</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Add configuration values for HTML message, msgtype.</p>
<h3 id="summary-ui-changes">User interface changes</h3>
<p>Changes to configuration form.</p>
issue