Hijack turtle / matplotlib graphics display to maintain state

Once I implement #51 I still have the problem of the graphics window popping up in-your-face. As a temporary solution I could give users code to make it pop in a certain area of your screen (ex: right half).

But preferably this would be inbuilt functionality, where the window would always appear in the last size and position you left it in. Not sure how to do this, maybe look at this thread for some ideas: https://github.com/donkirkby/live-py-plugin/issues/52