FE/Qt: language string updates.
FE/Qt4-NLS: merged ca, ca_VA, it, pt_BR
FE/Qt4-OSX: fix the translation of the application menu
FE/Qt4-NLS: Updated Swedish, Ukranian & Brazilian Portuguese.
FE/Qt4-NLS: updated qt_* translation files to 4.4.3
renamed VirtualBox4 to VirtualBox
purge the obsolete Qt3 GUI
FE/Qt: Export Brazilian Portuguese to OSE.