Siege PvE: Quiver fix & fire arrows

A small update is live: your arrows stay ready after you log in, you can change gear mid-siege, and Dragon's Breath finally burns.

## Bows and crossbows - Fixed bows and crossbows that couldn't aim or fire after you joined, even though your arrows or bolts showed as equipped in the menu. - Your ammo is now put back on a few seconds after you join, so you're ready to shoot.

## Inventory - You can change gear during a siege now. In the siege Inventory, click a slot on your character to Take off that piece (it goes into your bag), or Put on gear from your bag. - Handy if a piece ever bugs out: take it off and put it on again. - The stash and the smith are still in the hub only.

## Legendary weapons - Dragon's Breath now sets enemies on fire. Its arrows never set off the flame burst and 5 second burn (Emberfall's sword always did). Fixed, and the same goes for any legendary ranged weapon.

## Fixes - The hub box, How to play and the siege results card now always show up. Some players' games skipped loading them, which left no hub panel at all.

## Behind the scenes - New tools for staff, including a golly.gg map builder for making new areas. You won't see them, but you'll see what gets built with them.