Starts to be crazy. Many fonts have to be (visually!) inspected, because there is
no hint about this feature.
Also, for many fonts it is a senseless information.
We need a third value (besides serif and sans-serif)
Added (de)selecting fonts through its capability (latn, math, arab, etc)
Recognize also trebuchet in font name as sans-serif font
Recognize also fixed in font name as monospaced font
