x11: Shrink colour initialization code.

x11: Shrink colour initialization code.

Remove the large global XtResource array which is only used once at
program startup and replace it with a much more compact encoding,
(basically just the strings) which is sufficient to generate the
rest at runtime.  This appears to reduce the overall program size
quite a lot.

A further (very small) improvement is also realized by adjusting the
order of the resources to match the order in the state structure.