option to exclude duplicated sounds

[noob]

Hi forum,

here my feature request:

I find it annoying to see duplicated sounds in the lists, because i have copied them to some custom soundbank. There is an option in the header to show only soundbank sounds. Thats fine. But i would love to see some kind of tripple switch button with a 3. state to exclude soundbank sounds from the normal  instruments list.

regards,
noob