Reorganize information in lower three panels

[scottwittenburg]

The biggest complaint here is that the % loaded lives adjacent to the timestep slider, seeming to indicate that the % loaded has something to do with the which timestep is being viewed in the current scan.

The lower panels need a little reorganization in general, and this should include moving the percent loaded indicator closer to the metadata, and best would be to associate it with the experiment id in some way to help indicate that it's the amount of the experiment that is loaded.