Propose UI revamp for the Panels List in Global Administration

It is not clear first hand how to use this screen. There's a lot of text, and the user can eventually get its use. But we can do better marking what can be dragged and where.

There's also no way (that I know of) to configure these panels without using the mouse, so this would be an accessibility issue.

Shortcuts to panel configurations would also be nice. Example: link the Applications  panel config from this screen. This way we can prevent a lot of back and forth from Admin users.

The UI is also very dated and can get a visual design pass.