IMPORTANT HOTFIX FROM 0.3.78 -> 0.379: Fixed Seeker Spawn

• ➕ Added: New game mode for Early Access version: Traitor Mode! 🥳 (WIP)

• ⭐ Improved: (Benedict) Footprint-Trigger
• ⭐ Improved: Overhauled Late-Join: Switched to Allowed/Not Allowed only. Late Joiner are now spawned as spectators in a running session
• ⭐ Improved: Session settings in staging scene
• ⭐ Improved: Better issue/error/bug handling in the backend

• 🔧 FIXED: Training-Sessions no longer appear in session browser