Add a chat filter for <call>s.

[Mifaco]

Let me represent every event organizer or party leader who has had to use an annoying call to get the attention of the DRG reading forums or that WHM who stepped away 10 minutes ago...

{Thanks for the offer, but I'll have to pass.}

Calls are our best resource to wrangle in the people whose attention goes elsewhere during downtime. Sure, you can "deal" with it if it's a repeating issue, but making 2-17 other people wait while some guy looks at Christina Hendric's leaked pics... No thanks!

Make the window button flash instead of those annoying <calls>.