"Disable" method doesn't work on "flat" version of the color picker

[ivandotv]

If the picker is setup as flat=true and you call a disable command it doesn't prevents user interaction.

http://jsfiddle.net/iki_xx/6QShB/1/

[bgrins]

I remember bumping into this before, and didn't really think of a great way to show that it was disabled, so it just doesn't do anything for a flat colorpicker right now. Any ideas on what it should look like or do? I think if we just prevented the mouse from doing anything it would feel more broken than anything else. Maybe there could be a semi-transparent overlay on top of the whole thing.