Should fix#418 (critically wrong translation) and #419 (repeated
translations).
Includes some other fixes and additions.
timeshift-pt.po: Add a few sentences from pt_BR.po to get them more in
sync with each other.
../po/timeshift-pt_BR.po:264: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:549: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1218: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1240: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1323: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1329: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1338: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1351: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1355: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1364: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1386: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1470: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1508: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1517: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1594: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1938: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1968: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:1976: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:2102: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:2270: 'msgid' and 'msgstr' entries do not both end with '\n'
../po/timeshift-pt_BR.po:2363: 'msgid' and 'msgstr' entries do not both end with '\n'
msgfmt: found 21 fatal errors