Optimize all_events view
Optimize all_events view

Prefetch event.tags and event.site (waaay better performance).

wking/swc-amy,pbanaszkiewicz/amy,vahtras/amy,wking/swc-amy,pbanaszkiewicz/amy,shapiromatron/amy,shapiromatron/amy,vahtras/amy,vahtras/amy,wking/swc-amy,shapiromatron/amy,pbanaszkiewicz/amy,swcarpentry/amy,swcarpentry/amy,wking/swc-amy,swcarpentry/amy