Behaviorally: This change makes it so that Enter will never cancel
a dialog, unless that dialog only contains info to be read. Escape
will never unpredictably be treated as Enter. And some dialogs without
Escape to cancel, now can be canceled with Escape.
A lot of this just refactors dialogs to define the cancel button
at the top, not as a hotkey on a cancel button deep in the XML.
I think this makes enter/escape behavior in dialogxml files more
legible at a glance.
- Fix escape not ending shop mode
- Fix outdoor special spots not being drawn
- Fix special spots sometimes appearing off the edge of the sector in the scenario editor
- Add additional treasure type for "unique" items
- Main item dialog now shows the item ability's display name, and also has more space for the item's full name
- (Game) No-ammo missiles (eg slings) are now counted as weapons by shops
- (Dialog Engine) Fix LED groups being drawn when invisible
