Suggested additions to BoundingTool - display width/height

Adds option for 1 Subdivision (not sure if this should be labeled better in the UI?) that displays the width/height of the bounding box. 
I’ve also changed the color to my personal preference which should be disregarded – I guess it might be nice to add a ColorWell to the UI but I’ve held off so as not to clutter the (nicely compact) interface.
Cheers!