* feat: re-designed digest
Updated design, logic no longer shows "no topics", just doesn't
show the list at all, teaser re-retrieved for digest so that it
always grabs a teaser even if there is no reply, changed default
email background to a light grey.
* fix: minor padding issues in digest
* fix: banned template
* fix: invitation.tpl
* fix: removed unused notif_chat and notif_post email templates
* fix: notification template
* fix: registration_accepted template
* fix: reset tpl
* fix: test tpl
* fix: email verify tpl
* fix: reset notify tpl
* fix: welcome tpl
* fix: additional minor font fixes
* fix: removed unused email header image assets
* fix: internationalised 'your daily digest' string
* fix: broken url in digest 🤦
* feat: added RTL support for emailer
/cc @PostMidnight
f32a992237