Nonprinting Characters and AutoSpellcheck tooltips

Hi All,

I came across the tooltip 'Nonprinting Characters' in Writer and i think
it should be changes to 'Non-printing Characters' or 'Non-printable
Characters', as nonprinting is not a valid english word, even in
libreoffice's spellcheck. :slight_smile:

Also came across the tooltip 'AutoSpellcheck' and think it should be
changed to 'Auto Spellcheck' or 'Automatic Spellcheck'.

I'm mentioning this in the mailing list as i didnt see any means to make
suggestions for english (US) in the translation website.