Add a syntax to easily search for filter groups

[thirdy]

Currently the way to search for filter groups is by manually editing the terms\modgroups.txt in Terms tab. But that is not easy to do.

I think it's definitely possible to do this by combining existing search terms for mods.

[thirdy]

Proposed syntax:

jewel 3mods(10gcrit 10gcritmulti 10wed 5maxlife 10allres)