Don't load infobox on main page / non-main namespace articles

Change-Id: Ib7febb797df4ae4e05933a7a8e545572f5e877e1
Infobox styling tweaks

* Avoid flash of unstyled content when loading wikidata infobox
* Move 'expand' on to new line

Change-Id: Id5de721a61879ed9301c4ef25497ea79a7bb8f16
Merge "Don't load infobox on main page / non-main namespace articles"
Merge "Infobox styling tweaks"