Braille: Only pan to offset when there's not a non-zero targetCursorCell
Braille: Only pan to offset when there's not a non-zero targetCursorCell

updateBrailleReview() was unconditionally calling panToOffset(). We don't
want this panning to override the location set by panBrailleLeft() or
panBrailleRight().

GNOME/orca,GNOME/orca,GNOME/orca,GNOME/orca