Finish edit terrain type dialog in the editor and tweak some terrain properties

- Introduce enum for step sounds
- Remove union for treating terrain flags as either signed or unsigned
Editor:
- Add Choose button to select the "transform to" terrain.
- Implement Choose buttons as appropriate for the terrain flags, including editing the special that a terrain calls.
- Range-check the terrain flags.
- Add Custom button to choose a town as the combat arena.
- Fix/tweak/improve several of the terrain flag prompts.
- Fix placing shortcut key in field as its ASCII code instead of the letter
- Fix some of the range checks that were already in place but were incorrect or improperly static
Game:
- The wilderness terrain types now allow specifying how many d6's of food you get when hunting there.
- Crumbling terrain uses flag 2 instead of 3 to determine method (flag 2 was supposed to be strength but was never used)
- Merge two functions that did almost exactly the same thing (namely altering a terrain space and potentially updating conveyor/lights info)
- Merge switch_level into handle_lever since it was the only place it was called
- Remove global store_special_loc; the location is stored in the stuff_done array now
- Change when use/step on terrains will now update lighting if they changed to a terrain with a different light level
- Terrains that call a special no longer support mixed global/local modes - they either always call a local special or always call a global special
- Use previously unused swap_ter function (which did the exact same thing as the swap terrain special node)
Dialog Engine:
- Don't "erase" invisible icons or buttons; it's not necessary, since the entire window is filled with background before the draw() method is called, and it causes problems in case of overlapping elements.

rsrc/dialogs/edit-terrain.xml

@@ -41,6 +41,7 @@
 	<field name='light' top='193' left='271' height='16' width='52' />
 	<text top='193' left='333' height='14' width='128'>Transform to what?</text>
 	<field name='trans' top='193' left='467' height='16' width='52' />
+	<button name='picktrans' top='190' left='530' type='regular'>Choose</button>
 	
 	<text top='217' left='8' height='14' width='91'>Ground type:</text>
 	<field name='ground' top='216' left='109' height='16' width='52' />
@@ -81,6 +82,7 @@
 	<text name='flag1text' framed='true' top='385' left='109' height='14' width='209'>*flag1</text>
 	<field name='flag1' top='384' left='329' height='16' width='64' />
 	<button name='pickflag1' top='381' left='404' type='regular'>Choose</button>
+	<button name='editspec' top='381' left='404' type='large'>Create/Edit</button>
 	<text name='flag2text' framed='true' top='410' left='109' height='14' width='209'>*flag2</text>
 	<field name='flag2' top='409' left='329' height='16' width='64' />
 	<button name='pickflag2' top='406' left='404' type='regular'>Choose</button>
@@ -91,10 +93,11 @@
 	<text top='254' left='467' height='14' width='100'>Combat Arena:</text>
 	<field name='arena' top='275' left='467' height='16' width='64'/>
 	<button name='pickarena' type='regular' top='299' left='467'>Choose</button>
+	<button name='picktown' type='regular' top='299' left='532'>Custom</button>
 	<button name='object' top='344' left='467' type='large'>Object Details</button>
-	<text top='385' left='470' width='60' height='14'>Map icon:</text>
-	<pict name='seemap' top='375' left='550' type='map' num='0'/>
-	<field name='map' top='406' left='470' width='100' height='16'/>
+	<text top='410' left='470' width='60' height='14'>Map icon:</text>
+	<pict name='seemap' top='400' left='550' type='map' num='0'/>
+	<field name='map' top='431' left='475' width='100' height='16'/>
 	<button name='done' type='regular' def-key='enter' top='455' left='517'>OK</button>
 	<button name='cancel' type='regular' def-key='esc' top='455' left='451'>Cancel</button>
 	<button name='left' type='left' top='455' left='11'/>

rsrc/dialogs/pick-spec-type.xml

@@ -0,0 +1,14 @@
+<?xml version='1.0' encoding='UTF-8' standalone='no'?>
+<?xml-stylesheet href="dialog.xsl" type="text/xsl"?>
+<dialog defbtn='cancel'>
+	<pict type='dlog' num='16' top='8' left='8'/>
+	<text top='8' left='50' width='300' height='80'>
+		This terrain type is set to call a local special when used or stepped on.
+		That means it will call the special with the given ID in the current area, whether town or outdoors.
+		From here you can edit the corresponding special node in the currently active town or outdoor section.
+		Which would you like to edit?
+	</text>
+	<button name='town' type='large' top='90' left='10'>Edit Town</button>
+	<button name='out' type='large' top='90' left='125'>Edit Outdoor</button>
+	<button name='cancel' type='regular' top='90' left='287'>Cancel</button>
+</dialog>

rsrc/strings/ter-flag1.txt

@@ -1,6 +1,6 @@
 Small Icon
 What to change to?
-Amount of damage done
+Sides per die
 Unused
 Graphic when occupied
 Strength (1-8)
@@ -13,8 +13,8 @@ Unused
 Number of special to call
 Unused
 Unused
-Unused
-Unused
+Number of Dice
+Number of Dice
 Direction
 Direction
 Direction

rsrc/strings/ter-flag2.txt

@@ -1,16 +1,16 @@
 Unused
 Number of sound (99 - no sound)
-Damage multiplier
+Number of Dice
 Unused
 Unused
 Percentage chance
 Unused
-Strength
+Method
 Unused
 Difficulty (0-4 L, 5-9 M, 10 I)
 Unused
 Unused
-Type of special (0 - local, 1 - town/global, 2 - out/global, 3 - global)
+Type of special (0 - global, 1 - local)
 Unused
 Unused
 Unused
@@ -21,4 +21,4 @@ Unused
 Unused
 Unused
 Number of sound (99 - no sound)
-Type of special (0 - local, 1 - town/global, 2 - out/global, 3 - global)
+Type of special (0 - global, 1 - local)

rsrc/strings/ter-flag3.txt

@@ -5,7 +5,7 @@ Unused
 Unused
 Status type
 Unused
-Method (1 - Move Mountains, 2 - quickfire, 0 - either)
+Unused
 Unused
 Can be bashed? (0 - can't, 1 - can)
 Unused