Hints for xfce4-power-manager in main

Warnings

• missing-launchable-desktop-file
  The MetaInfo file references a .desktop file with ID 'xfce4-power-manager-settings.desktop' in its launchable tag, but the file was not found in the same source tree. In order to be able to launch the software once it was installed, please place the MetaInfo file and its .desktop files in the same package.