Buffer display when recording a movie (or a reason for the stoppage)

[thormj]

I think it would be handy to show if the card is keeping up with the video or burst recordings (green/yellow/red [yellow/red indicates that resolution reduction (raw+jpeg, now just jpg) is happening] (or, when it stops, spit out a message that indicates the stoppage reason; eg: Card too slow / No Space Left / Sensor overheated)...