Bug 122850 Table/list should not be able to be inserted in Master Page mode.
Description: Table/list should not be able to be inserted in Master Page mode. Steps to reproduce: 1. New a report and transfer to Master Page mode. 2. New a datasource and dataset 3. Drag a list/table to page header/footer, bind it to dataset and drag some columns inside. 4. Save and preview Expected result: Insert list/table item in master page should be forbidden. Actual result: They are allowed and preview showed "undefine" in page
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
continue;
					UserPropertyDefn uDefn = (UserPropertyDefn) current.userProperties
							.get( key );
					element.userProperties.put( key, uDefn.copy( ) );
				}
			}
			current = current.isVirtualElement( )
					? current.getVirtualParent( )
					: current.getExtendsElement( );
		}
		return element;
	}
	/**
	 * Returns the validation error list, each of which is the instance of
	 * <code>SemanticExcpetion</code>.
	 * 
	 * @return the validation error list.
	 */
	public List getErrors( )
	{
		if ( errors == null )
			return new ArrayList( );
		return errors;
	}
	/**
	 * Returns the identifier for locating element to user. This identifier
	 * string helps user locate this element in user interface. If this element
	 * has name defined, the name and element type are returned with the form
	 * "ElementType('Name')". Otherwise, locate the first container with name
	 * and generate the containment path with the form,