Squish: Fixed some minor problems

 * problems on shutdown (mostly Win)
 * timing problems (Mac, Win)
 * support for accidental whitespace in settingspath (all)
 * added support for further special characters that could exist
   inside TreeView of the Project files (all)
 * removing the testing folder instead its content (all)

Change-Id: I146b56d253e3245641d0dcaebfad4d6f1dd684fc
Reviewed-by: Robert Löhning <robert.loehning@nokia.com>