Port away from Qt's foreach all loops over rvalue container objects
Summary:
The other simple part of foreach porting, as those containers objects
are not shared with anyone, so the removal of the container copying has
no risks.
GIT_SILENT
Reviewers: dfaure
Reviewed By: dfaure
Subscribers: kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D23810