add a dialog to plot information about each plc device event emissions.

git-svn-id: svn+ssh://controls01/siciliarep/svn/trunk/tango_client/ctlinac/trunk@13146 a18efa20-c439-0410-bf20-9b91ec695b4c
partially fixed the 'danger operation' checkbox with distinction between rise and falling edge.

git-svn-id: svn+ssh://controls01/siciliarep/svn/trunk/tango_client/ctlinac/trunk@13147 a18efa20-c439-0410-bf20-9b91ec695b4c