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
* @return the resolved value if the resolve operation is successful,
	 *         otherwise the unresolved value
	 */
	public StructRefValue resolveStructReference( Module module,
			ElementPropertyDefn prop )
	{
		Object value = propValues.get( prop.getName( ) );
		assert value == null || value instanceof StructRefValue;
		if ( value == null || module == null )
			return (StructRefValue) value;
		StructRefValue ref = (StructRefValue) value;
		if ( ref.isResolved( ) )
			return ref;
		
		
		
		
		
		
		StructRefPropertyType refType = (StructRefPropertyType) prop.getType( );
		refType.resolve( module, prop, ref );
		if ( ref.isResolved( ) )
			ref.getTargetStructure( ).addClient( this, prop.getName( ) );
		return ref;
	}
	/**
	 * Attempts to resolve an element reference property. If the property is
	 * empty, or the reference is already resolved, return true. If the
	 * reference is not resolved, attempt to resolve it. If it cannot be
	 * resolved, return false.