add the ability to search and list heroes by talent

[Mr-Bandit]

when looking in the heroes section of 'pedia you can search by alpha, age, and relations, but if im looking for a scout none of that is too useful.

if you have already met someone you should be able to search and rank by skills too (if you have not met them how do you know what they are good at? so you have to met them first to use this search!)