Complete and correct Romanian (ro) translations (rustdesk#14837)

* Complete and correct Romanian (ro) translations

- Fill in all previously empty translation strings
- Fix plural form: "fișier" → "fișiere" (files)
- Fix "Receive" → "Primește" (was incorrectly using "Acceptă")
- Fix "Too frequent" → "Prea frecvent" (removed erroneous extra word)
- Fix "Note" → "Notă" (was translated as verb instead of noun)
- Fix "Use both passwords" → "Folosește ambele parole" ("programe" typo)
- Fix "Automatically record incoming sessions" → "sesiunile primite" (not "viitoare")
- Fix typo "neautoriztă" → "neautorizată" (Connection not allowed)
- Fix typo "dispozivul" → "dispozitivul" (Restart remote device)
- Fix leading whitespace in "Username" translation
- Fix "FPS" → keep as "FPS" (was incorrectly translated as "CPS")
- Fix "Forget Password" → "Parolă uitată" (command form was grammatically wrong)

* Fix typo in Romanian translation for accessibility tip

* unify informal register and fix subjunctive typo

Author: LucaBarbaLata