Clear all failed recordings

[stefan]

I can see how this would get way down on the list, since I've used the program for a while now and not felt the need until right now :-)

I've just come back from a long vacation (anybody missed me? ) and had my computer shut off. Naturally I had lots of "failed" in the list. It would then have been nice to have had a "clear all failed" with one simple command, instead of having to go through each one and delete them by hand.