I'm seeing large whitespace in between items of the top navbar that I'm certain isn't meant to be there. Screenshot of our homepage built with 0.4.1:  ...and the same page built against current master (ab928989):  The browser console shows that there are many empty `li` items in between our nav items "tutorials" and "examples":  Any idea what is causing this? **EDIT** here's the site: https://github.com/drammock/mne-python/tree/new-website-theme/doc