Change the way 'where/shop <ability>' work so it doesn't give false positives.

[netforce10]

When looking where you can craft an item an item one of the easier ways is to first look which shops would perhaps have that recipe via 'where/shops ' However as it stands that gives a list of all the shops of which the owners have that ability, not necessarily whetever any recipes for it are provided.

A possible solution would be to instead have it based on the recipes that are provided, does a shop have any recipes available which require the ability. i.e. if a shop has the recipe to make an aeterna top then it will show up with 'where/shop tailor'.

Another solution would be to allow searching by recipe name for example 'where/shop aeterna top' will show any shops which have that recipe available.