PresentWindows effect: Do not highlight windows based on mouse if user is currently typing

If the user is currently typing, do not highlight windows based on the mouse position. If the user types a window title before the effect opening animation is finished, he ends up in a situation where only one window is on the screen but it is deselected (because the mouse is not on the window) or another window is selected because of the mouse. With this change, the mouse input does not overwrite the window highlighting based on the search entered if the user is currently typing.