Update #2 - Version 0.5.0 — Operation Athena Steam update #851211

FEATURES: - Added private server functionality, including the ability to set a server name and password. - Improved feedback system to inform players when a mission is in progress and they cannot join. - Introduced HUD changes to allow players to view and adjust AI spawn amounts during missions. - Fixed Single player "Return to HQ" functionality to streamline transitions after mission completion. FIXES/CHANGES: - Fixed issues with private and mission-in-progress servers to improve reliability and accessibility. - Addressed an issue where the menu would duplicate upon player death. - Made significant level design and art improvements to Homebase, Blacksite, and other maps. - Updated HUD mission elements to provide clearer information and better player guidance. - Resolved server visibility issues that previously prevented proper functionality. - Fixed several bugs related to server passwo...