When you have a lot of custom panels the debugger bar can become very wide. I'd like to propose a: Debugger::$hideLabels option. Obviously it would be up to panel authors to update to support this, but I think it would be very helpful.

I have implemented it within the code for my custom panels, but I would rather see it in the core. Here is an idea of the difference it can make:

Let me know if this is something you might be interested in and I can put together a PR.