Feature request: Allow setting only one coordinate of the mouse position, for instance to center the mouse vertically in the current window without altering its X position. Currently, in the "move mouse to position" action, if you leave one of the coordinate fields blank it gets set to 0, so there is no way to move the mouse in only one direction at a time. Ideally, if you left one field blank, it would have no effect on that component of the mouse's position, e.g., leaving the X coordinate field blank would only move the mouse vertically.
