In swing program which uses GridLayout/GridBagLayout, Mouse moving and
default focus are incorrect in right-to-left orientation environemnt.

When I use AWT, Mouse moves from right to left with every pressing TAB
in right-to-left orientation. And, default Mouse focus is put on top-right
button.
But, unlike AWT, when I use swing, mouse moves from left to right and
default focus is put on top-left button even in right-to-left orientation.

I guess swing should behave same way as awt.