Update: more destructive weapons/projectiles, bugfixes

What's new:

• All projectiles (including ones from shooter placeables and weapons) damage all saw blades, explode mines and TNTs immediately.
• Safe zones now fully cover the platform below players at the "nest".
• Blob shards now match the dead blobs original size and color.
• Bugfix: weapons dropped by dead players didn't disappear.
• Bugfix (hopefully): sometimes during weapon pickups an extra weapon object spawned at the location of the box.
• Bugfix: player respawns sometimes resulted in multiple players of the same ID. This also lead to multiple shatter animations displaying when the overlapping instances of the same players were killed.
• Bugfixes related to projectile destruction.