Return correct x,y coordinates for keystroke with ginput in Qt (bug #44834). * Canvas.h (updateCurrentPoint (fig, obj)): New prototype for 2-argument form of updateCurrentPoint used with QKeyEvents. * Canvas.cc (updateCurrentPoint (fig, obj)): New version of function that uses QCursor::pos() to get CurrentPoint rather than using data embedded in QMouseEvent. * QtHandlesUtils.h (figureCurrentPoint (fig)): New prototype for 1-argument form of figureCurrentPoint used with QKeyEvents. * QtHandlesUtils.cc (figureCurrentPoint (fig)): New version of function that uses QCursor::pos() to get CurrentPoint rather than using data embedded in QMouseEvent.