Hints for freecad in main

Warnings

• asv-desktop-app-launchable-missing
  org.freecadweb.FreeCAD.appdata.xml -
  This `desktop-application` component is missing a `desktop-id` launchable tag. This means that this application can not be launched and has no association with its desktop-entry file. It also means no icon data or category information from the desktop-entry file will be available, which will result in this application being ignored entirely.
• screenshot-download-error
  Error while downloading screenshot from 'https://wiki.freecadweb.org/images/7/72/Freecad016_screenshot1.jpg': Failed to download file: Could not resolve host: wiki.freecadweb.org
  This might be a temporary server issue, or the screenshot is no longer available.
• screenshot-download-error
  Error while downloading screenshot from 'https://wiki.freecadweb.org/images/f/f7/FreeCAD_highlight_3_0.19.jpg': Failed to download file: Could not resolve host: wiki.freecadweb.org
  This might be a temporary server issue, or the screenshot is no longer available.
• screenshot-download-error
  Error while downloading screenshot from 'https://wiki.freecadweb.org/images/c/c3/Arch_tutorial_43.jpg': Failed to download file: Could not resolve host: wiki.freecadweb.org
  This might be a temporary server issue, or the screenshot is no longer available.
• screenshot-download-error
  Error while downloading screenshot from 'https://wiki.freecadweb.org/images/f/f4/Freecad-document-01.jpg': Failed to download file: Could not resolve host: wiki.freecadweb.org
  This might be a temporary server issue, or the screenshot is no longer available.