Rework the "Automatch finder" (formerly "Quick match finder")

[jlt]

It sometimes takes several minutes to find an opponent via automatch. To decrease waiting time, I proposed this:

Where are all the new players?

On some servers like Fox or IGS, pressing the (live) automatch button also sends challenges to users who are online but didn’t press automatch. The challenged player needs to press “accept” within 5 seconds or so, otherwise the challenge is considered as declined and is sent to the next player on the list. To avoid being annoyed by unsolicited challenges, any user can check a box “decline challenges”. However the box is un-checked each time you log off and on again. Maybe such a feature should…