Feature request: scrolling the table of contents sidebar simultaneously

[queuedq]

In the view mode, I have to scroll the table of contents sidebar on the right side manually when it gets longer.
I want the scroll position of TOC sidebar to sync with current viewport.
The attached image shows the TOC sidebar not showing current section—Typography section.
Tested on Google Chrome, Ubuntu 16.04.2

[jackycute]

Hi @queued37
Thanks for bringing this up.
I think this is a small but sweet enhancement.