Disable room editor

PortabilityLayer/PLHacks.cpp

@@ -10,8 +10,12 @@ bool IsMacPlusSoundBanned()
 	return false;
 }
 
-// High scores disabled until dialogs work
 bool IsHighScoreDisabled()
 {
 	return false;
 }
+
+bool IsRoomEditorDisabled()
+{
+	return true;
+}

PortabilityLayer/PLHacks.h

@@ -3,3 +3,4 @@
 bool IsMacPlusGraphicBanned();
 bool IsMacPlusSoundBanned();
 bool IsHighScoreDisabled();
+bool IsRoomEditorDisabled();