Hints for nitrokey-app in universe

Hints

• asv-cid-contains-hyphen
  com.nitrokey.nitrokey-app.appdata.xml:3 - com.nitrokey.nitrokey-app
  The component ID contains a hyphen/minus. Using a hyphen is strongly discouraged, to improve interoperability with other tools such as D-Bus. A good option is to replace any hyphens with underscores (`_`).
• screenshot-no-thumbnails
  No thumbnails have been generated for screenshot 'https://raw.githubusercontent.com/Nitrokey/nitrokey-app/master/images/icon/nitrokey-app-icon-128-black.png'.
  This could mean that the original provided screenshot is too small to generate thumbnails from.