D9523: Silence a warning in preference_with_button.xml

[Matthijs Tijink]

mtijink accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R225 KDE Connect - Android application

REVISION DETAIL
  https://phabricator.kde.org/D9523

To: nicolasfella, #kde_connect, mtijink
Cc: #kde_connect, SemperPeritus, ahmedbesbes, daniel.z.tg, jeanv, tfella, aboudhar, seebauer, bugzy, progwolff, MayeulC, menasshock, ach, apol
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