New functions

Main changes

• A option to avoid subpixels.
• Make host and emulated window resizable.
• Set the image filter to "Nearest Neighbor".
• displays the keys coordinate.
• Resizer improved, vertical and horizontal Resizer added
• prevents a key from being outside the canvas.
• fixes the problem that no regions can be created if one exists at 0x0
• host_controls are not created if not used.
• fixes a crash when an image file tries to overwrite itself.