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
*/
	public void setProperty( ElementPropertyDefn prop, Object value )
	{
		assert prop != null;
		String propName = prop.getName( );
		
		
		if ( prop.isIntrinsic( ) )
		{
			setIntrinsicProperty( propName, value );
			return;
		}
		
		if ( prop.getTypeCode( ) == PropertyType.ELEMENT_REF_TYPE )
		{
			ElementRefValue oldRef = (ElementRefValue) propValues
					.get( propName );
			updateReference( oldRef, (ElementRefValue) value, prop );
		}
		
		if ( prop.getTypeCode( ) == PropertyType.STRUCT_REF_TYPE )
		{
			StructRefValue oldRef = (StructRefValue) propValues.get( propName );
			updateReference( oldRef, (StructRefValue) value, prop );
		}
		
		if ( value == null )
			propValues.remove( propName );
		else
			propValues.put( propName, value );