Fixed a couple strings for consistency. Had to change "verifyMasterPassword", from "Verify Master Password" to "Verify Password" (in Portuguese), since it didn't fit the title bar in the extension popup because the Submit button becomes unreadable.
* pt_PT translation
* pt_PT translation pass
* pt_PT translation of COPY.md
* pt_PT translation of COPY.md pass
* pt_PT translation of COPY.md pass 2
* pt_PT translation of CAPTIONS.md
* pt_PT translation pass 2
Expect more passes as the extension isn't even loading, so some strings might be too big. Need to evaluate how to shorten them without removing meaning and clarity.