[suggestion] play sound when invited to a rematch

[BoosPeople]

I created a new suggestion, https://boardgamearena.com/bug?id=31851, to play a customizable sound when invited to a rematch after finishing a real-time game. The rematch invitation icon is very small and not very noticeable. Playing a sound when invited for a rematch would make it less likely to miss invitations and speed up game play.