[Gameplay] Graves Crits Nexus

I think that was supposed to be fixed since Oct or something. I don't know if it was skipped by developers because it's intended or if it's an immortal bug that comes back to haunt us but IMO in a situation where you run to defend you are actually helping Graves kill it faster so you might aswell sit afk in your fountain(don't do that).

It's easy to reproduce both on Nexus and Inhibs and most probably towers.