The manual can't be used when built with Sphinx >= 5 #121
Description
When built with Sphinx 5 or 6, the manual layout looks like this
(Firefox 108.0.2):
The links in the main text are not clickable.
See #67 (comment) and #67 (comment).
Worked around in 54df366.
Related to #98 (comment) because it would be nice to be able to publish the manual on e.g. Read The Docs.