This is a regression from 8u20 b10. With the fix of RT-36500, the palette(12x10 color blocks ) is always in LTR orientation, but this causes a problem for key navigation at both ends of the rows if the application is in RTL orientation.

For example, in RTL orientation,
1. when current color is the left-most of row 1, the left arrow key should move the selected color to the right-most of row 2
2. when current color is the right-most of row 1, the right arrow key should move the selected color to the left-most of row 10
but now the key navigation follows LTR rules.