Better default font / font fallbacks per platform / per language

[dacap]

We should be able to specify font fallbacks for platforms and for different languages.

• Use a more better font for Japanese on Windows  #2550
• Localized font support #3945
• Should we make the default font bigger? e.g. Font issues with Hungarian #4819, I'm not a fan of this option, but probably if we can convert the default font to TTF and calculate baselines/height line depending on the required text/used glyphs/language it might be the best option.
• Several i18n improvements #4307