Bug 148761 Unable to copy a report item from template to report
Steps: 1. Create a template, add a Text item "t1" or others 2. Create template item using "t1" 3. Double click the template item and we get a report item again. 4. We copy the item, paste to another report file. Expected: the text item can be copied. Actual result: Nothing happened, not copied and no error msg.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ElementDefn.java
* set of contents is called a <em>slot</em>. Each slot has a cardinality
 * (one or many), and a type. More specifically, each slot can contain a set of
 * element types. The {@link SlotDefn}class holds details of a slot.
 * <p>
 * Slots are indexed using a slot ID. The ID is a zero-based index, allowing the
 * caller to easily iterate over the slots.
 * 
 * <h3>Names and Name Spaces</h3>
 * 
 * Elements can have a name. Some elements require a name, for some the name is
 * optional.
 * <p>
 * The element name is meant to be unique within a <em>name space</em>. Name
 * spaces reside on the root element. Name spaces include elements, styles, data
 * sources, data sets and so on. Each element type identifies its name space
 * using a name space ID.
 * 
 * <h3>Method</h3>
 * 
 * Elements can have methods that defines the script. All methods are defined in
 * metadata. The element can inherit the methods defined in parent. Property
 * mask can change the method visibility.
 */
public class ElementDefn extends ObjectDefn implements IElementDefn
{
	/**
	 * The property is hidden in the property sheet.
	 */
	protected final static String HIDDEN_IN_PROPERTY_SHEET = "hide"; 
	/**