Several tweaks and fixes

Bugs:
- Arrow keys activated the arrow buttons in the list-mode edit string dialog
- Graphics classification was not saved correctly in some cases
- Contact info was not correctly saved/loaded
- Place Monster node didn't have a choose button for the monster type
- Alt-Backspace and Alt-Delete did not work correctly in dialog text fields
- When clicking Edit Terrain Types, sometimes the list of items or monsters would appear instead
- Fix monster 0 being selectable in the choose monster dialog
- Fix the hotspots of all the cursors to be more intuitive

New:
- When interrupting a special node sequence with Cmd-. / Ctrl-C, the dialog that appears is more relevant.
- In the choose sound dialog, the sound now plays when you select a choice, so you can hear what it will sound like
- Added a tiny icon so you can distinguish fire and force barriers in the editor

rsrc/dialogs/confirm-interrupt.xml

@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='UTF-8' standalone='no'?>
+<?xml-stylesheet href="dialog.xsl" type="text/xsl"?>
+<!--<!DOCTYPE dialog SYSTEM	"dialog.dtd">-->
+<dialog skin='dark' defbtn='cancel'>
+	<pict type='dlog' num='23' top='9' left='9'/>
+	<text top='5' left='51' width='255' height='72'>
+		Warning: If you terminate the special node sequence, the scenario may be left in an unexpected state.
+		It is recommended that you immediately reload from a saved game after doing this.
+		<br/>                     Are you sure you wish to proceed?</text>
+	<button name='quit' type='regular' top='86' left='178'>Kill it!</button>
+	<button name='cancel' type='regular' def-key='esc' top='86' left='248'>Not yet</button>
+</dialog>