Also update default binds for SDL2 keypad names

these changed, presumably in SDL2 - might want to review all the others

Use visible team count instead of total team count to determine rendered team bar height

Remove rubber duck from BRW, RW and most weapon schemes for now The duck is not liked by players. Rubber duck needs a lot of rework. Before that happens, better remove it from game modes for now. Players can always modify the weapon schemes, of course.