scoreboard: fix calculation of initials when name is LASTNAME,FIRSTNAME
person form: add status 'prereg' (pre-registered)
images: add a 'game in progress' icon
scoreboard: do not show pre-reg players, show in_progress games
scoreboard: fix extra bubbles problem
scoreboard: fix game count for unfinished games
scoreboard: fix win/loss bug; show game_in_progress icon in legend
images: resize game_in_progress_icon
scoreboard: enlarge first column