When clicking on a numbut to either directly type in a new value, or to increment it with the arrows, the mouse may move 1 or 2 pixels between when the button was pressed, and when it was released. This results in an unwanted slide adjustment to the value, and the change must be undo'ed or corrected.

This small patch changes numbuts to require you slide the mouse outside of a threshold (currently +/- 3 pixels) before it considers your movement a slide adjustment. It is very inconspicuous, but results in far fewer accidental adjustments.