Fix bugs

Author: UltimatePea

src/script/InterpreterConstructActions.java

@@ -66,21 +66,7 @@ private void performAddDataLineSegment() {
 		DataLineSegment seg = new DataLineSegment(fromPoint, toPoint);
 		addLineSegment(seg);
 		// push action to the manager
-		SharedUndoRedoActionManager.getSharedInstance().pushUndoableAction(
-				new UndoRedoableInterface() {
-
-					@Override
-					public void undoAction() {
-						seg.remove(panel);
-						panel.repaint();
-					}
-
-					@Override
-					public void redoAction() {
-						panel.addPaintComponent(seg);
-						panel.repaint();
-					}
-				});
+		
 	}
 
 	private void performAddLineSegment() {