Using double click on item to select encoding

Change-Id: If5f58467144a72d29fca7b320f55cd9c21f4457f
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
Reviewed-by: Nicolas Arnaud-Cormos <nicolas@kdab.com>
Reviewed-by: David Schulz <david.schulz@digia.com>
DocumentManager: Support expect/unexpect directory changes

Change-Id: I68b69fa00dd6cc189ecfcdb9dfad09c41531883f
Reviewed-by: David Schulz <david.schulz@digia.com>