I say that because it's been asked a 1000 times and so far has not happened and I'm extrapolating into the future 
It's something that seems not to be so hard and surely would be very helpful.
Correct on the second point and I assume also the first although I don't know how the IDE has been coded.
It's a very useful feature but either there's nobody that can/will do it or people are happy with a single number at the bottom.
Maybe those that care use a decent editor anyway and don't push for change, like me.
I don't know but I wouldn't hold your breath.
Rob