fix broken messages on lobby join

Pas2C: Add a couple of missing symbols

Port code to pas2c dialect

pagevideos: Prevent renaming video if file name prefix is already used This prevents some issues and weirdnesses with losing the video thumbnail, etc.

Move video thumbnails to VideoThumbnails/, fix video renaming not renaming the thumbnail as well

Play sndFirstBlood after first damage/kill/poisoning of enemy (instead of ANY damage) This avoids sndFirstBlood being played for self-harm, for which this taunt is a bit odd.

Don't play "LeaveMeAlone" taunt if attacker hits same hog multiple times in same turn Because weapons like cluster bomb could trigger it in a single turn otherwise. The idea is the same hog must be hit across multiple turns.