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.
- It's now exposed in the schema with a new attribute, outline, on all elements that accept framed
- It now has four possible values: solid, outset, inset, double. Dashed or dotted may be added later; they're a lot harder.
- Second make scenario dialog uses a custom frame style
