Once more an attempt to prevent the mouse being stuck to the bottom quarter

• added a preventative extra resolution set when booting the game for the first time, to prevent the weird resolution/mouse issue
  
• changed how the mouse coordinates are calculated in-game to finally (sigh) to prevent the mouse cursor being stuck to the bottom left of the screen for some people (due to weird resolutions at first time boot)
  

Unity is setting the resolution wrong ingame the first time it boots for some users. This causes the ingame mouse to be stuck to a small section of the screen, and the sureveyor to keep rotating one way cuz basically the cursor is always stuck to a corner of the screen.

This is another attempt to fix this, or work around the issue .

If you experience this issue still, changing resolution in the settings immediately fixed it for everyone (but it should now never happen (I pray))