I agree, so I went on and fixed it! I explained what I thought was the issue, which turned out to be a very minor visual bug, and the actual issue and fix in a Medium post:
Thanks! BTW, the :active trick is very, very neat. It took me a bit to understand that it was so you can actually click on the links. I normally use checkboxes for that, but I might find some use for the :active hack.
https://medium.com/@fpresencia/fixing-bloomberg-menu-mimic-6...
Edit: PR merged; removed own link