Reworked BMenu::Set/IsEnabled(). I tested what happens under beos and our code seems to be finally correct

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15999 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/Menu.cpp

@@ -532,11 +532,9 @@ BMenu::SetEnabled(bool enabled)
 		return;
 
 	fEnabled = enabled;
-	for (int32 i = 0; i < CountItems(); i++)
-		ItemAt(i)->SetEnabled(enabled);
 	
-	if (fSuper)
-		fSuper->SetEnabled(enabled);
+	if (fSuperitem)
+		fSuperitem->SetEnabled(enabled);
 }
 
 
@@ -582,7 +580,10 @@ BMenu::IsLabelFromMarked()
 bool
 BMenu::IsEnabled() const
 {
-	return fEnabled;
+	if (!fEnabled)
+		return false;
+
+	return fSuper ? fSuper->IsEnabled() : true ;
 }