Is there a "Label Manager" for Gmail, similar to Chrome's Bookmark Manager?

Hey everyone -

Is there a Google native tool that gives you a dedicated, full-screen interface for managing your g-mail labels? I'm picturing something exactly like the Chrome Bookmark Manager (the page you get when you hit Ctrl+Shift+O), where you can easily see the whole hierarchy, drag and drop labels to nest them, batch rename, change colors, etc.

Right now, the only way I know is to go into Settings > See all settings > Labels. It's just a long, clunky list and feels really inefficient for managing a complex system of nested labels.

Am I just overlooking a hidden feature, or does this kind of "power-user" interface for labels not actually exist in Gmail?

Thanks for any help!!!