make navigation entries expandable (#550)

Author: korikuzma

docs/source/conf.py

@@ -75,6 +75,8 @@ def _parse_release_as_version(rls):
 html_theme = 'sphinx_rtd_theme'
 html_logo = 'images/GA-logo.png'
 
+html_theme_options = {'collapse_navigation': False}
+
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".