Added new MG-42 model, animations and audio

Added new Gewehr 43 model, animations and audio

Added several new skins for the MG-42 and Gewehr 43 weapons

Made improvements to the profile container on the main menu

Made further enhancements to first-person weapon audio

Fixed some Z-fighting that occurred on several UIs

Fixed 'Loading Terrain' screen not showing custom background

Fixed logo glitching out on the in-game menu screen

Fixed issue with unlinking Discord account