Fix #1329026 [Missing/wrong translations in Kobo Aura config](https://bugs.launchpad.net/calibre/+bug/1329026)
More fixes for #1329026
Edit Book/Book polishing: Fix embedding all referenced fonts not catching fonts that are only specified via style attributes and not in any stylesheets.
Edit Book: Add a new tool to manage fonts. Allows easily changing/removing/embedding fonts in the entire book. To use it go to Tools->Manage Fonts
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Normalize font names when changing fonts and the font is available on the local machine
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Edit Book: Check book: When auto-changing font name to match actual name in font file, also change the font name in shorthand font declarations
Remove unnecessary use of unquote
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