Pickup spawn improvements (#4525)

Pickups are now thrown around when spawned, like in vanilla. Pickups also bail out of the collision detection checks while being created, to prevent them from blasting too far off in e.g. cobblestone generators.

src/Entities/Entity.cpp

@@ -972,7 +972,7 @@ void cEntity::HandlePhysics(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
 			}
 		}
 	}
-	else if (!(IsMinecart() || IsTNT()))
+	else if (!(IsMinecart() || IsTNT() || (IsPickup() && (m_TicksAlive < 15))))
 	{
 		// Push out entity.
 		BLOCKTYPE GotBlock;