i18n: drop translations of push-to-lock strings, removed in 99edd97366e3 A few of the dropped strings had meanwhile been translated. That gave conflicts when rebasing the po update from 99edd97366e3 and to branch head. That was resolved by dropping these conflicts.

pytest >= 4.6.6, < 4.7
pytest-sugar >= 0.9.2, < 0.10
pytest-benchmark >= 3.2.2, < 3.3
pytest-localserver >= 0.5.0, < 0.6
mock < 3.1
Sphinx < 1.9
WebTest < 2.1
isort == 4.3.21