Split src/paperwork/util.py between backend and frontend

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>
Backend/util/split_words: Use nltk.word_tokenize() to split words

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>
Backend/util: Remove unused function

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>
Docsearch: Don't strip accents when searching. The fuzzy search will take care of this problem for us

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>
Main window: Fix app menu loading

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>
Mainwindow: Appmenu: Add option 'settings'

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>
Mainwindow: App Menu: readd advanced options

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>
Merge branch 'unstable' into wip-no-feature-file