Hints for font-manager in main

Hints

• asv-nonstandard-gnome-extension
  org.gnome.FontManager.appdata.xml:87 - kudos
  This tag is a GNOME-specific extension to AppStream and not part of the official specification. Do not expect it to work in all implementations and in all software centers.
• asv-screenshot-media-url-not-secure
  org.gnome.FontManager.appdata.xml:108 - http://raw.githubusercontent.com/FontManager/resources/master/main_window.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-screenshot-media-url-not-secure
  org.gnome.FontManager.appdata.xml:128 - http://raw.githubusercontent.com/FontManager/resources/master/google_fonts_integration.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-screenshot-media-url-not-secure
  org.gnome.FontManager.appdata.xml:123 - http://raw.githubusercontent.com/FontManager/resources/master/compare_mode.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-url-not-secure
  org.gnome.FontManager.appdata.xml:154 - http://fontmanager.github.io/
  Consider using a secure (HTTPS) URL for this web link.
• asv-screenshot-media-url-not-secure
  org.gnome.FontManager.appdata.xml:113 - http://raw.githubusercontent.com/FontManager/resources/master/character_map.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-screenshot-media-url-not-secure
  org.gnome.FontManager.appdata.xml:118 - http://raw.githubusercontent.com/FontManager/resources/master/browse_mode.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.