There is already a device collections column in the device view in calibre that will show your kindle collections (but only for non Amazon files). Implementing it for amazon files would slow down connection times greatly and is not a trade-off worth making. If you want to see your kindle collections in calibre, I'd suggest using the calibre kindle collections plugin, then your collections on the Kindle will be automatically created from the metadata in calibre. Which makes having a view of the collections on the kindle pointless.
For even better automatic support for collections, get a SONY