A red line for toggled events ?
I'm afraid I don't even know what you are refering to. I just had a quick try in R70, when toggling an event, the condition gets cross lined, as usual, with a dark line over the condition to show it is disabled.
Is that what you are refering to ? If so, apparently it works.
If it is something else, could you post a screenshot of what you see/what you intend to see ?
Sorry if I'm missing your point.