[IMP] extensions: add content tabs (backport of cf6ca0fb)

closes odoo/documentation#1624

Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

conf.py

@@ -120,9 +120,13 @@ extensions = [
     # Code switcher (switcher and case directives)
     'switcher',
 
+    # Content tabs
+    'sphinx_tabs.tabs',
+
     # Strange html domain logic used in memento pages
     'html_domain',
 ]
+
 if odoo_dir_in_path:
     # GitHub links generation
     extensions += [
@@ -175,6 +179,9 @@ languages_names = {
 # The specifications of redirect rules used by the redirects extension.
 redirects_file = 'redirects.txt'
 
+sphinx_tabs_disable_tab_closing = True
+sphinx_tabs_disable_css_loading = False
+
 #=== Options for HTML output ===#
 
 html_theme = 'odoo_theme'