Bug 135265 Paste to a wrong column
Steps to reproduce: 1.Open the attached file 2.Choose the column[2] which contains a label , copy and paste to column[3] Expected result: It will be pasted to column[3] Actual result: It is pasted to column[4] The related bug is #103448
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
/**
	 * The validation executor. It performs the semantic validation and sends
	 * validation event to listeners.
	 */
	protected ValidationExecutor validationExecutor = new ValidationExecutor(
			this );
	/**
	 * The listener list for validation event.
	 */
	private List validationListeners = null;
	/**
	 * The file name. Null means that the module has not yet been saved to a
	 * file.
	 */
	protected String fileName = null;
	/**
	 * The system id which is needed for resolving relative URIs. It can be a
	 * relative/absolute file directory or a network path such as HTTP, FTP,
	 * etc.
	 */
	protected URL systemId = null;
	/**
	 * The UTF signature.
	 */
	protected String signature = null;
	/**
	 * The default units for the design.
	 */
	protected String units = null;
	/**