Yep, which tab is my active tab? Your guess is a good as mine It actually looks slightly more obvious in the screen shot than on a large monitor but it could easily be any one of the purple container tabs. If the active tab was inverted or something...
I was about to create a new suggestion but yours addresses mine I'd like to be able to add a comment to each password so I agree this is a good idea. Hopefully it will be added in the future.