Hints for tke in community

Warnings

• ancient-metadata
  The AppStream metadata should be updated to follow a more recent version of the specification.
  Please consult the XML quickstart guide for more information.
• asv-desktop-entry-category-invalid
  tke.desktop - Programming
  A category defined in the desktop-entry file is not valid. Refer to the XDG Menu Specification for a list of valid categories.
• screenshot-download-error
  Error while downloading screenshot from 'https://a.fsdn.com/con/app/proj/tke/screenshots/tke_screenshot.jpg/182/137': URL was not found on the server.
  This might be a temporary server issue, or the screenshot is no longer available.