Adds the following replaceable to notices:
These tags pull from the date-time criteria options for when to start/top showing a notice.
Absolute times are displayed in the user's timezone.
All changes occur in real-time (new post, delete, edit, etc.)
Editing own/all messages
Deleting own/all messages
Clear chat (/clear command)
Sound notifications in chat
Chat ad above messages
The username of the user who is currently typing a...