add an option for kneeboard position

[uboats]

I hope there can be an option to set the kneeboard position (left/right of the screen).

 

I'm using a 8" monitor as 2nd screen (to the right side of main, and smaller res than main), so kneeboards of many A/C cannot be displayed completely. if there is such option, then I can set all kneeboards to be displayed at the left side of screen.