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.
- Modifiers are now given in the def-key attribute, as originally intended
- Dialogs that have a help button now assign F1 to that button (replacing shift+/ in some cases)
- F1 also brings up help in the main game (in addition to shift+/)
- You can copy/paste images into the sheet, or import/export to/from png files
Also:
- Picture controls in the dialog engine have a new "scaled" flag; if set, the picture will be scaled into the provided bounds rather than overflowing. Currently, only full sheets honour the setting.
