Fix some strings left & add translation

[gdonisi]

Hi, here's my translation. I've also moved some strings in the strings.xml file. As I said, I'm not very familiar with Kotlin so please review and edit my code if needed :)

[certified84]

Hi there @gdonisi, I went through these changes and I must say you really did a good job. Lots of hardcoded strings I didn't even pay attention to (especially in the EditNoteFragment). Cheers mate 👍👍👍

[certified84]

Hi there @gdonisi, you really did a good job here mate. I don't speak Italian 😂 so I had to use a translator and I must say this was really a job well done. Although some strings didn't translate properly (I thinking it has to do with my translator) but I'll really appreciate you going through the translations again. I'll go ahead and merge this PR. After going through the translations again, if there are any correction, kindly open another PR too. Well done mate 🙌🙌🙌