Camera/Player perspective is affected by mouse movement in UI menus

[BobTheHunted]

When this mod does actually detect the correct input device, there is an issue where mouse movements made while in the inventory, pause menu, or any other in-game UI menu cause the perspective to move instantly upon exiting the UI, presumably to where the player would be looking if the same mouse movements were made outside of the menu. It's quite distracting and disorienting, even if not game-breaking