We use it to display the state and we're providing them as fallback,
they will always be available.
Otherwise, on some platform this clashes with the icon engine falling
back to less specific version of the icon (i.e. smartphone instead of
smartphone-connected).
https://specifications.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
Reviewed by Albert Vaca
Ported using KDELibs4Support, for a smaller delta, so we can keep
developing on master until we decide not to.
At the moment, it builds and installs but tests don't pass because
of a QCA2 initialization problem I didn't manage to debug yet.
CCMAIL: kdeconnect@kde.org
