Repaired tthe display problem for settings menu

dungeonbattle/display/menudisplay.py

@@ -11,7 +11,6 @@ class MenuDisplay(Display):
 
     def update_menu(self, menu: Menu) -> None:
         self.menu = menu
-        self.values = [str(a) for a in menu.values]
         self.trueheight = len(self.values)
         self.truewidth = max([len(a) for a in self.values])
 
@@ -54,6 +53,10 @@ class MenuDisplay(Display):
     def preferred_height(self) -> int:
         return self.trueheight + 2
 
+    @property
+    def values(self):
+        return [str(a) for a in self.menu.values]
+
 
 class MainMenuDisplay(Display):
     def __init__(self, menu: MainMenu, *args):