Fix 'ghost' messages / make the 'matched, please wait' message optional

[Rhyme]

While waiting to see if an embed works or not SaucyBot posts a message like this,

If you aren't looking at the channel at the moment this message is posted and then deleted, it leaves you with a 'ghost' unread message notification on the channel until you right click the channel and mark it as read.

If there's any way to silence this single message in the process per-server that'd be rad