Minor changes to spectate UI

Increased UI width, made lack of item display as "None".
Socket tweaks

Added a timeout.
Tweaked vehicle spawning randomness

Specific vehicle spawns should also get weighted spawning.
Added 2 guns and 2 ammo types

.50 BMG and .308 calibres as well as a Model 70 scoped rifle and a
special secret weapon in memory of a staff member known as John Lennox.

Tweaked loot spawns and added the new items. The bolt action rifles are
now more common.