don't show triggers that haven't changed state if expression is changed

if a trigger that has FALSE state has it's expression edited, it appears in he trigger list flashing.
it would be nice if such triggers didn't pop up in this list.
rationale :
in an extreme example, imagine some 100+ switches with 24-50 ports each. let's say there's some trigger for each port to watch something (maybe change from full duplex to half duplex, maybe something else ).
if the trigger is slightly tuned, suddenly triggers page is swarmed with flashing true triggers and helpdesk has a large, quite useless page to watch