sphinx-bootstrap default navbar_fixed_top breaks side navbar scrolling

Per https://pypi.org/project/sphinx-bootstrap-theme/0.4.8/

sphinx-bootstrap assumes a default of 'navbar_fixed_top': "true" if it is not set in html_theme_options of conf.py

I have confirmed that conf.py of the current github mirror of the docs project contains no html_theme_options and would inherit all defaults described at the URL given

This causes the sidebar to hover and it can not be scrolled until the content pane of the page is scrolled completely to the bottom.

For many documentation URLs this results in navigation requiring one to scroll through dozens of pages of content then multiple pages of navbar for the desired section to be visible to click and is almost but not quite entirely unusable in this form.

See e.g. https://docs.opendaylight.org/projects/aaa/en/stable-fluorine/dev-guide.html

The behavior is browser independent

Please set navbar_fixed_top to false in html_theme_options of conf.py