CHANGELOG:
-Rectangles are fully locked inside image bounds
-Special Save in "Tools" for scaling values on export
-Resizing now locked to selected rectangle to prevent switching rectangles when trying to resize
-Rectangles now have selection bounds, you must click near the middle to select them
-Transform menu for moving or scaling rectangles (Note: There's a bug with rescaling where the colored part of rectangles don't immediately scale, if this happens, zooming will fix them)