pylupdate does not extract translations when f-strings are used for the
translated text, so all f-strings are migrated to calls to format().
Several other minor translation issues are also addressed.
NOTE: This code has been run through the Black reformatter, which adds
trailing commas in many places that the stock Qt 5.x pylupdate does not
recognize. This code must be processed with the corrected pylupdate to
generate the correct translations.
c62dc32739