* fix: #7604 shortened CTA text and added custom text for some notifs
Specifically, new-reply and new-chat have different CTA text as they
do not go to the forum home like other email templates send users to.
* fix: minor optimization as suggested by @barisusakli
<span style="color:#ffffff;" class="button-link"> [[email:notif.cta<!-- IF notification.cta-type -->-{notification.cta-type}<!-- END -->]] → </span>