Refactor teambuilder folders list
Refactor teambuilder folders list

The old approach was to convert the folder list into a string format
that would sort correctly, and then convert it back afterwards. This
was, of course, a huge hack that was difficult to maintain and broke
every new generation, and `PSUtils.sortBy` eliminates the need for it.

Zarel/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client