Loose the word "tube" in notification; simplify logic
Loose the word "tube" in notification; simplify logic

The two previously handled cases - no services found and no service
found for the particular tube are actually the same, so this unifies
them into one case with one notification.

Breaks string freeze.

REVIEW: 110004
CCMAIL: e027b972e407923da7dd840903ef953893c4e777@kde.org

KDE/ktp-approver,KDE/ktp-approver,KDE/ktp-approver