Use monospace font on the left category list.

[nzm001]

For geoip.dat, I want to judge if a category is country by the number of letters. I assume all the two letters are countries, while others are not. Am I right?

[DanielLavrushin]

@nzm001 hej man, added + icons
https://github.com/DanielLavrushin/GeodatExplorer/releases/tag/v1.1.1