Add support to search by number of open mods

[melink14]

Deep in to a league I often have tabs full of good bases that I may want to slam/craft and it'd be great to get search for items based on how many open mods they had.

I image being able to search for suffixes and prefixes individually would be useful. (0,1,2,3) of each similar to socket colors perhaps.

[thailyn]

The number of open mods is not provided by the GGG API, so we can't provide that directly. It is possible to guess what the affixes are on items, like other tools do, but that is simply guessing and, if we do implement that, it will not be always correct.

[melink14]

Ah, that's too bad even though added it to their trade site now.

Yeah, I can see how the heuristics would be fragile and imperfect so might not be worth it in the long run.

[aydjay]

Might be possible to pull the data we need out from poedb