Describe the feature

show CD of items within bags, doesn't seem to do this - does show the time remaining in tooltip, but no visual within the item inside the bag

Describe the implementation

Just show the items CD, if it has one ongoing

I've noticed a similar thing with Profession Knowledge Treatises. My character with Blacksmithing and Mining, for example: use the BS treatise and the mining one will go into a cooldown, but the bag won't display it until a refresh (right-click on the bag icon) is triggered.