pangowin32: add back the old font fallback list for each registered font
In f523c25c I changed the font fallback list from hardcoded to reading it from the registry to cover all potentially default Windows UI fonts. Turns out that this doesn't cover all of Unicode and breaks things like Marathi.
This adds back the language specific font fallbacks to each font read from the registry to restore the old Unicode coverage.
Fixes #375 (closed)