Notifications
{% include "controlpanel/notifications-list.html" %}Add notification
You can use Markdown in notifications. You can use '!everyone' as a recipient to show the notification to everyone, or '!tag' to show the notification to users with a specific tag (e.g. '!admin' or '!student').
For expiration time, enter amount of seconds. When empty, the notification will not expire. Note that if a notification is sent to !everyone or a specific tag and made dismissable, any user can dismiss it and that will delete the notification for all other users (so you probably shouldn't do that).