Focus is traversed along different paths for UP and DOWN ARROW keys.

To reproduce for color palette:
- open color palette
- move the focus to the first row of the palette
- push UP ARROW key
The focus will be moved to the last row of palette.
- push DOWN ARROW key
The focus will be moved to custom color link
- push DOWN ARROW key
The focus will stay on custom color link.

To reproduce for custom color dialog:
- open custom color selection dialog
- select HSB tab
- push DOWN ARROW key
RGB tab will be selected
- select Red slider
- push UP ARROW key
RGB tab will be selected