Italian localization - Additions and Updates (fix typos)

Updated localization with the latest version of these Scripts/Extensions:

unprompted (new)
img2tiles
random
random grid

Some new options in the Extras and Settings have been translated too.

P.S.: I fixed a couple of typos. By mistake I uploaded this file also in the main branch of my fork and didn't know how to revert the commit. Sorry for the mess.