fix default LP Switch behavior for back compatibility

diylc/diylc-library/src/main/java/org/diylc/components/guitar/LPSwitch.java

@@ -380,6 +380,9 @@ public class LPSwitch extends AbstractTransparentComponent<String> implements IS
 
   @EditableProperty(name = "Middle Terminals")
   public MiddleTerminalConfiguration getMiddleTerminalConfiguration() {
+    if (middleTerminalConfiguration == null) {
+      middleTerminalConfiguration = MiddleTerminalConfiguration.Connected;
+    }
     return middleTerminalConfiguration;
   }