Small improvements to sliding puzzle. (1) Don't draw the 'Moves' box at fixed size...

Small improvements to sliding puzzle. (1) Don't draw the 'Moves' box at fixed size, and display 'Moves:' and number of moves on one line for square and portrait screens. (2) Use 4x4 spots on Archos too, to make the spots look square on the Archos display - change the default 80x64 image accordingly. (3) Replace the 110x110 images with 108x108 so that the width is evenly divisible by 4 (number of spots) as mentioned in the comment. (4) Make the greyscale images look a little less broken, could be even better though. -- The code could be made simpler and more flexible but one step at a time.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16200 a1c6a512-1295-4272-9138-f99709370657