Option request

Hi Florian!
Would it be possible to have a sortable boolean field in the file view only to indicate if the files has embedded coverart? I'm currently refreshing my collection of about 199k files and one such field would help a lot. I also have some feedbacks regarding the Tools menu but I'd rather stick to one topic at the time.

Go to "View > Customize Columns" and add a column with the value %_covers%

Done! Thanks! It even works better than requested as it shows me whether a file has more than 1 image which I don' want either.