[Idea] Linking picture size text fields when creating a new image

[Craftist]

Hello. What's about this:

When creating a new image, and changing width of this, height will change too?

But it'll work only if I don't changed height value by myself.

This is scheme:

[BoltBait]

The question in the first box should be "Is the 'Maintain aspect ratio' box checked?" then paint.net already works like that.