I've had a play around with the addon today and I couldn't find what I was looking for so this may turn out to be a feature request.
I want to track some cooldowns by white listing the spells and having them as icons. This works fine, the cool down appears but once it reaches 0 the icon disappears. Is it possible to have the icon remain as a reminder to use the spell again now it's off cooldown? I couldn't find anyway to do this with the latest version. Maybe have the timer stay at zero to show it's ready to use again. It would be great to change the color / opactiy of the icon whiles it on / off cooldown too.