Ideas should be made more visible by pointing to them on the main
governance website.
Depends-On: https://review.opendev.org/#/c/706240/
Change-Id: I4ce1e0910a9a9fd558c7dfc66f7059d89d4c0d66
The top site at governance.openstack.org was using an
old oslosphinx-based theme. Inherit from openstackdocstheme
instead, in the same way as the TC site.
Change-Id: I434ad5327b5ce4cec0eec66e54d3834bcc91b657