add extra handles in middle in Perspective tools

[pruus]

I have a wish that when i use the perspective tool with the extra handles between the corners. What they do? If You click at a middle point You can go left right, down or up without changing the corners. This will mike the use faster. If the perspective is good. But some parts do not fill/fill well, just use one handle. This speeds up the porecess. That is my idea. See encolosed image.