Move DisplayObjects logic out of prompts.js
Update DisplayObjects spec
Move DisplayMenu logic out of Prompts
Add Help specs
Add preserveHotkeyNames option

Useful for things like Help.DescribeKey where we need to look up a key
in the keymap.
Move Help logic out of Prompts
Don't try to parse item objects
Fix Types.ClientKeys not using correct key specification
Fix item list heading style
Update Layout spec