Task#4501 - Fix translations to pt_BR (Felamimail and Addressbook)
Task#4627 - Collapse/Expand contact groups
Task#3545 - Calendar's Print button not shown
Task#4684 - Use only Felamimail to treat mailto links and implements RFC 6068
Task#4884 - Added button inside Invitation Details Panel
Fix layout of e-mails with tables inside, changed HTMLPurify's Lexer