Figured as much – the UI grows more dynamic by the week! 
Here’s some additional feedback:
Maybe the Section Outline could also be made accessible in one of the sidebars in the same way that Comments are.
No need to scroll the section vertically to hunt for a random opening among unique content where the Section Outline happens to be visible. Instead, to immediately jump elsewhere in the section, simply:
hover > expand > click on Section Outline
This would make sections instantly navigable, even when the user is sandwiched among a stack of many wide tables… or hundreds of rows deep in a single wide table… or sandwiched among a stack of many wide tables that are hundreds of rows deep!! 
I would use this all day, every day.