Merged r5948 from trunk.
French translation update.
Merged r5944 from trunk.
Merged r5881 from trunk.
Merged r5880 from trunk.
Fixed: activity shows updates of private issues (#8432).
Merged r5940 from trunk.
remove trailing white-spaces from rake redmine📧test task source.
Merged r5939 from trunk.
handle a nil user in rake redmine📧test task.
Merged r5938 from trunk.
use rake task parameter style message if redmine📧test parameter is blank.