Hints for mono-tools-gui in xenial

Hints

• description-from-package
  This component gets its description from the package it is located in.
  This has several disadvantages, like missing localization, possibly too short descriptions, too technical descriptions for users of software centers, etc.
  Please consider writing a metainfo file for this component. In the near future, components without metainfo file might be dropped from the metadata. You can consult the XML quickstart guide for more information on how to write a metainfo file.