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

src/scenedit/scen.townout.cpp

@@ -528,7 +528,7 @@ void outdoor_details() {
 		eAmbientSound choice = eAmbientSound(hit[3] - '1');
 		if(choice == AMBIENT_CUSTOM) {
 			int i = prev == "snd4" ? current_terrain->out_sound : -1;
-			i = choose_text(STRT_SND, i, &me, "Choose ambient sound:");
+			i = choose_sound(i, &me, "Choose ambient sound:");
 			if(i < 0) {
 				lg.setSelected(prev);
 				return false;