Summon Fixes, More Chests & Level-Up Protection

• Summons now finish fighting their current target before returning to you, even when you move out of range. • Tripled base equipment chest drop chances from normal and elite enemies. • Increased the equipment chest limit from 1 to 3 per wave. • Added 0.5 seconds of damage immunity after closing the level-up screen. • Removed black backgrounds from several weapon icons.