Konfigurator: Avoid some duplications

Authored by asensi on May 8 2020, 8:49 PM.

Description

Konfigurator: Avoid some duplications

Use a variable in Konfigurator to avoid duplications (to prevent e.g. that one
text is changed, but not a copy of it).

Differential Revision: https://phabricator.kde.org/D29429