[feature-request] "Smart" missed call notification icon

This is not quite the answer. I really don't need to have an icon on the lock screen if the caller was able to call me at a later time. I'm not talking about the call log. What I see there is the number of missed calls from the same caller. But if the caller was able to call through, I don't need to know how many times the caller tried to call me. The icon should just go away if no pending missed calls are left or only indicate the calls that I was really missing and still did not answer. Some situations don't allow you to take a closer look on the details so all you need is straight and useful notifications ;)