Update 0.39.1

Fixed some scripting node descriptions
Fixed incorrect weapon rotations in some menu backgrounds
Fixed incorrect snowman hat interaction after being dropped
Fixed that the head device (night vision) could not be toggled on/off
Custom corpses can now be referenced as movable object in scripting
Fixed preview of armor in equipment panel
Planes will now crash when their pilot died
Fixed custom item icon preview tool
Fixed a bug that caused custom items to become missing when subscribing to new units or prefabs
Fixed flipped normals on the improvised semi auto rifle
Fixed a bug that allowed invalid .obj files with NaN normal values to be imported
Fixed siege and animal filters in the placement list
Fixed that the custom particle system cone arc was limited to 90° instead of 360
Fixed that using units with unknown custom equipment from the quick play menu would result in them missing their equipment when playing
Fixed that when loading player equipment presets with unknown custom items, the items were missing on the player