qttools5-dev is required in order to build with qt5 on debian and ubuntu
Merge pull request #3769

d6b3689 qttools5-dev is required in order to build with qt5 on debian and ubuntu (Haakon Nilsen)
English translation update

A few new messages have been added since last update.
Merge pull request #3692

098316c English translation update (Wladimir J. van der Laan)