better channels

Signed-off-by: William Casarin <jb55@jb55.com>

damus/Util/Notifications.swift

@@ -139,6 +139,12 @@ extension Notification.Name {
     }
 }
 
+extension Notification.Name {
+    static var chatroom_meta: Notification.Name {
+        return Notification.Name("chatroom_meta")
+    }
+}
+
 extension Notification.Name {
     static var unfollowed: Notification.Name {
         return Notification.Name("unfollowed")