Hints for skrooge-common in main

Errors

• missing-desktop-file
  Found an AppStream metainfo XML file, but the associated .desktop file is missing. This often happens when the .desktop file is renamed, but the <id/> tag of the AppStream metainfo file is not adapted as well, or if the metainfo file is located in a different package than the .desktop file.
  Please fix the packaging or work with upstream to resolve this issue.