Merge tag '1.4.1' into develop

1.4.1
Merge branch 'develop' of github.com:ether/etherpad-lite into develop
Merge branch 'develop' of github.com:ether/etherpad-lite into develop
Merge branch 'develop' of github.com:ether/etherpad-lite into develop
Merge branch 'develop' of github.com:ether/etherpad-lite into develop
Merge branch 'develop' of github.com:ether/etherpad-lite into develop
Merge branch 'develop' of github.com:ether/etherpad-lite into develop
Merge branch 'develop' of github.com:ether/etherpad-lite into develop
mobile ui polish