Maybe I'm the only one who was annoyed that it now requires two clicks to filter the professions-frame by the things you actually have mats for. So I put a invisible button on top of the portraiticonthingamajig to toggle filters - see the image to your right.
But then I thought that hey, maybe someone else was irked by this.
Reworked to a more, imho, aesthetically pleasing solution.
Added toggle for skill-ups filter.