Number keys, Space to attack, and faster corpses

Three more requests from our Discord, all live now.

Number keys

With Move with WASD on (the default), the number keys do what the F keys do:
- 1 to 6 cast your spells, in the order of the Spells panel.
- 7, 8, 9, 0 use the four hotbar slots.
- F1 to F10 still work as before.

Space to attack

• Space attacks the nearest creature you can see.
• Press it again to switch to the next one, closest first.

Corpses

Corpses were staying ten minutes and piling up during a hunt, hiding the loot underneath.
- An empty corpse now disappears after 30 seconds.
- A corpse with loot still inside stays 3 minutes.

Refresh the page to get the update (Ctrl+R, or Cmd+R on a Mac).