Improve appearance of control bar

[Naved Islam]

Follow this link's answer by SuperNova to add a new (default) setting where certain x and y co-ordinates of the mouse will trigger the bar instead of any movement making it show.

Keep the current setting as an option though. Depends on #36

[Naved Islam]

Nah, any movement is better, so while moving the mouse down the user can already see the bar and aim correctly before getting to any kind of y-coordinate threshold