Tear out most of the legacy code in the scenario editor - see below for details

- All Carbon code is gone
- Many dialogs converted; some are still left unimplemented since they still need to be converted
- Menus converted to a xib file
- The giant arrays specifying the configuration of the special node dialog for each special node type have been replaced with maps and sets.

Changes to dialogs:
- pict choice dialog can now show picts of differing types; this was required for picking a monster graphic, as monsters of all sizes need to be shown in the same dialog
- string choice dialog can set the title, and properly shows the currently selected string
- LEDs now accept font format
- Fixed LED group's calculation of its rect
- Fixed LED group crashing if it has no selection
- Tabbing between text fields now works
- Fix display of larger monster graphics in dialogs
- Fix the script element content showing in the browser preview

rsrc/dialogs/delete-town-confirm.xml

@@ -0,0 +1,18 @@
+<?xml version='1.0' encoding='UTF-8' standalone='no'?>
+<?xml-stylesheet href="dialog.xsl" type="text/xsl"?>
+<dialog defbtn='okay'>
+	<button name='okay' type='regular' top='143' left='252'>OK</button>
+	<button name='cancel' type='regular' def-key='esc' top='143' left='187'>Cancel</button>
+	<pict type='dlog' num='16' top='6' left='6'/>
+	<text top='6' left='49' width='271' height='66'>
+		You are about to delete the last town in your scenario’s town list
+		(so if you have 10 towns in your scenario, the tenth will disappear).
+		This change will immediately be saved, and can’t be undone.
+	</text>
+	<text top='127' left='49' width='268' height='14'>Are you sure you want to do this?</text>
+	<text top='73' left='49' width='276' height='53'>
+		Make sure to remove all outdoor entrances to the deleted town,
+		as well as all references to it in special encounters.
+		Failure to do so will result in scenario run-time errors.
+	</text>
+</dialog>