04a538494b
Revamp of the side menu;
Round all borders for consistency with the buttons;
Improve .sig-* and .o_code elements;
Improve sphinx-tabs hover effect;
task-3046383
closes odoo/documentation#4112
X-original-commit: 3056c7b62d
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>