Comment 6 for bug 1321309

I strongly agree that we need to denote missed alarms -- that information should be prominent.

What's not clear to me is The Right Way to do this. We can't turn the individual menuitems' icons red because they're removed from the menu when the time has passed, since they're no longer upcoming events. We also can't change the panel icon because there's no way to 'clear' the warning to a normal state.

One thing we could do is to keep old alarms in the menu if (and only if) they were missed. These menuitems' icons will change to red and can be cleared by clicking on them. The indicator's main icon could be red if there are any missed alarm menuitems in the indicator. This isn't a perfect idea. While it does give the user needed information about missed alarms, (1) it's a little clumsy and (2) what happens if we have a handful of missed alarms? They will crowd out the upcoming alarms on the menu.

Another option would be to leave a "missed alarm" message in the Notification center... that raises interesting dependencies between the indicators :)

This ticket still needs Design feedback.