How to edit metadata for custom user loops in Logic Pro 11

When adding custom user loops to the Apple Loops Library, I can add metadata to my custom loop. But once my loop is added to the library, there is no way (at least, I have not found it yet) to modify this metadata.

I have already found that my custom loops are located in ~/Library/Audio/Apple Loops/User Loops/SingleFiles. And to rename a loop, I have to do this via the Finder and re-index the complete Apple Loops Library. But there is no way to modify the metadata that I have set when adding my user loop to the library.

My follow up question to @Apple is: When creating an great product as Logic Pro, why are these little thing (let's call it) overlooked?