$self: this object
DESCRIPTION
This method extends Module::start and is invoked to start host manager
$self: this object $headerString: a title for the dialog
DESCRIPTION
This method display a dialog allowing the user to change the hostname
$self: this object
DESCRIPTION
This subroutine creates the Host dialog to add host definitions
DESCRIPTION
This subroutine creates the Host dialog to modify host definitions
$self: this object $data: reference to the array containaing the host data to show into the table
DESCRIPTION
This subroutine populates a previously created YTable with the hosts data retrieved by the Config::Hosts module