Note:

 - /etc/skel/* did not match anything anymore, so it was not expanded
   by the shell, which made chown fail. Also, /etc/skel/.[a-z]*
   did not support .[A-Z]*. So I'm now handling all of /etc/skel,
   which should support all possible cases.

 - "Scenario: The Report an Error launcher opens WhisperBack",
   once adapted to start WhisperBack without using the desktop launcher,
   now became a subset of
   "Scenario: WhisperBack has access to debugging information",
   so I've removed it.