Sync to trunk.
Fix #1171043 ([ENHANCE] Keyboard access to Restore Defaults)
PDF Output: Fix hyperlinks not working when converting an EPUB whose individual files have names with URL unsafe characters. Fixes #1169795 (Private bug)
Fix bug in Danish translation causing books with language Ingush being incorrectly translated as Engelsk
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Store: Update Kobo program links.
Store: Remove affilate program from Google books because they are retiring the program.
Sync to trunk.
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