Fix spellcasting and dynamic menus

- Spell targeting line and array draws nicely, though not the same as the original
- Fix targeting falsely complaining about being off the edge of town
- Monster info dialog works properly; attacks now display correctly
- Fix dialogs always showing the wrong terrain or monster graphic
- Spell menus, monster menus, and PC editor item menus all work
- Spellcasting dialog now chooses the correct spell
- Fix out-of-place LED in spellcasting dialog

osx/dialogxml/pict.cpp

@@ -386,13 +386,13 @@ std::shared_ptr<sf::Texture> cPict::getSheet(eSheetType type, size_t n) {
 	std::ostringstream sout;
 	switch(type) {
 		case SHEET_TER:
-			sout << "ter" << n;
+			sout << "ter" << n + 1;
 			break;
 		case SHEET_TER_ANIM:
 			sout << "teranim";
 			break;
 		case SHEET_MONST:
-			sout << "monst" << n;
+			sout << "monst" << n + 1;
 			break;
 		case SHEET_DLOG:
 			sout << "dlogpics";