Add a "favourites" button for previously ordered products

It would be great if a "favourites" button could be added to the previously ordered products section. This would help our office team ensure the correct product is being used when adding to an order / quote. Sometimes there are a number of different styles of t-shirts for example (if customer has ordered a few as samples). Being able to tick one style as a "favourite" would ensure we are confidently selecting the correct one.