Font family quoting in the config

[The-Compiler]

making a note for future searchers here -- one quirk of the Font type is you need to escape spaces in your font family name now

Originally posted by @neeasade in #5512 (comment)

The current situation is a bit confusing:

• Some settings changed types (notably fonts.tabs -> fonts.tabs.selected / .unselected and fonts.debug_console)
• However, there was a subtle behavior change there which isn't handled by the migrations: The Font config type requires quoting for font families containing spaces, which QtFont did not.

Not sure what to do about it... I suppose we could fix the migrations, but that would make the migration rather complex (needing to parse the value) and won't help people who already are running the newer version (unless we detect this case of an unquoted font name with spaces and fix it in another migration).

Alternatively, I suppose we could make the quoting optional for Font, relying on our own parsing.

I suppose the easiest option would be to not do anything about it 😆