Text boxes for resizing

Starting in version 0.7 Retro Graphics Toolkit now uses text boxes to resize the tilemap and chunks.

If you are here right now it may be because you are surprised that you typed in a number and nothing happened, that is because you did not press the enter key after you typed in the number that you want.

If you are wondering why I changed this, it is because I found it was a faster way to get precise values. With sliders you would have to use the mouse at a rough position and then maybe adjust with arrow keys or move the mouse carefully. In all other cases I have found sliders to be more efficient.