Scoreboard panel
Make the scoreboard a panel (no HUD editor support): Scoreboard, Accuracy stats, Rankings and Map stats now can be shown with panel borders.
While working on it I fixed these minor bugs:
- text not vertically centered in the table rows
- incorrect scoreboard/HUD fading on quick (repeated) press/release of the scoreboard key
- inverted behaviour of the scoreboard key when the game is paused (or during a timeout)
- bad truncation position of player name when there's an icon ahead of it
- Get rid of a warning in the console when starting a game: "fixed missing field ''"