Display (grayed out) inactive players with non-zero scores

Display (grayed out) inactive players with non-zero scores

This issue came up with playtesting last night: We had a player who
finished in the top three overall, but dropped out for the last couple
of rounds. But we still wanted to see their score in the final
results. So, here we keep track of active and inactive players and
display the inactive ones (if they have non-zero score) with 50%
opacity.