Add an offset translation to maintain offset even if we don't want the tree to move when focusing a node.
Add an offset translation to maintain offset even if we don't want the
tree to move when focusing a node.

tim777z/jit,mcanthony/jit,shzy2012/jit,shzy2012/jit,printedheart/jit,shzy2012/jit,philogb/jit,shelsonjava/jit,printedheart/jit,shelsonjava/jit,pingjiang/jit,mcanthony/jit,pingjiang/jit,philogb/jit,shelsonjava/jit,printedheart/jit,tim777z/jit,pingjiang/jit,mcanthony/jit,tim777z/jit