Main window: Fix work dir examination

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Jobs: when displaying stacktrace, don't display just the file names instead of the whole file paths. It makes the stacktraces harder to read and even confusing sometimes

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Create the workdir when Paperwork starts / the config is changed, instead of when the first scan is done.

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Main window: In case of scan error, fix the display of the error message

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Replace python-levenshtein by nltk

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
DocSearch: Make sure the index schema is up-to-date, regenerate the index from scratch otherwise

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Main window: Reduce box-related job priorities. They are not that important

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
DocSearch: Add the document date in the whoosh index (useful for searching)

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Main window: Search field tooltip: Add infos on how to target specific dates

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Update french translations

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Fix french translation

Signed-off-by: Jerome Flesch <jflesch@gmail.com>