Hints for handbrake in main

Warnings

• asv-type-property-required
  fr.handbrake.ghb.metainfo.xml:5 - translation (ghb)
  This tag requires a type property.
• asv-mimetypes-tag-deprecated
  fr.handbrake.ghb.metainfo.xml:53 -
  The toplevel `mimetypes` tag is deprecated. Please use `mediatype` tags in a `provides` block instead to indicate that your software provides a media handler for the given types.
• asv-relation-display-length-value-invalid
  fr.handbrake.ghb.metainfo.xml:120 - medium
  This `display_length` item contains an invalid display length. Its value must be a positive integer value denoting logical pixels. Please refer to the AppStream specification for more information on this tag.