Implement the options menu, part 1

This commit implements loading and saving options from/to config, and
enough UI toolkit magic to allow changes to boolean options to be
persisted.

We now respect the "play movies" setting and take screen resolution
from the config file.

internal/menus/menus.go

@@ -10,11 +10,19 @@ import (
 	"code.ur.gs/lupine/ordoor/internal/util/asciiscan"
 )
 
+type MenuType int
+
 const (
-	TypeStatic     = 0
-	TypeMenu       = 1
-	TypeOverlay    = 61
-	TypeMainButton = 228
+	TypeStatic          MenuType = 0
+	TypeMenu            MenuType = 1
+	TypeButton          MenuType = 3
+	TypeInvokeButton    MenuType = 50
+	TypeOverlay         MenuType = 61
+	TypeHypertext       MenuType = 70
+	TypeCheckbox        MenuType = 91
+	TypeAnimationSample MenuType = 220
+	TypeMainButton      MenuType = 228
+	TypeSlider          MenuType = 232
 )
 
 type Record struct {
@@ -22,7 +30,7 @@ type Record struct {
 	Children []*Record
 
 	Id       int
-	Type     int
+	Type     MenuType
 	DrawType int
 	FontType int
 	Active   bool
@@ -183,7 +191,7 @@ func setProperty(r *Record, k, v string) {
 	case "MENUID", "SUBMENUID":
 		r.Id = vInt
 	case "MENUTYPE", "SUBMENUTYPE":
-		r.Type = vInt
+		r.Type = MenuType(vInt)
 	case "ACTIVE":
 		r.Active = (vInt != 0)
 	case "SPRITEID":