Bug: When the chat is "always on screen", the ToC overlaps the content (by a couple of pixels)

[guakamole]

Hello,

When the ToC is displayed together with the chat ("always on" feature), the tail of the content is overlapped by the ToC.

Here is a demo (turn on the "chat always on" feature) : https://pad.lqdn.fr/p/ep_table_of_contents?toc=true