Quick Link in Decorated Products to update available garment colours

Currently if you setup a decorated product and decide to limit the number of garment colours available you then have to work through a ridiculous number of pointless screens, accessed through the "Edit Decoration" link if you ever want to change which garment colours are available on that product. This is a waste of time, counter-intuitive, and utterly pointless as a workflow process. 

It would be much MUCH better if on the Decorated Product screen there was a simple link to take you to the screen which shows the product and the available colours as swatches. This would allow us a much faster process when a client phones up and says "Hey, you know that logo t-shirt we've got on our affiliate store that I said I only wanted on a black shirt ... well ... can we have it on a blue shirt now as well please? Thanks!"