[Worg] Keep table of contents visible in wide viewports?

[Adam Porter]

Hi,

Looking at Worg now, it occurred to me that, when my browser window is 
maximized, there's plenty of room for the table of contents to remain 
visible alongside the content.  But it's hidden automatically, and 
remains hidden until the user interacts with it, which seems suboptimal 
for an intra-page table of contents.

Could we modify it to keep the ToC visible when the window is wide 
enough?  I think that would be a big usability improvement.  WDYT?

--Adam