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/Module.java
* @return the property definition whose detail type is of the given
	 *         structure name, otherwise null
	 */
	public ElementPropertyDefn getReferencablePropertyDefn( String structureName )
	{
		if ( referencableProperties == null )
		{
			referencableProperties = new HashMap( );
			referencableProperties.put( ConfigVariable.CONFIG_VAR_STRUCT,
					getPropertyDefn( CONFIG_VARS_PROP ) );
			referencableProperties.put( EmbeddedImage.EMBEDDED_IMAGE_STRUCT,
					getPropertyDefn( IMAGES_PROP ) );
			referencableProperties.put( CustomColor.CUSTOM_COLOR_STRUCT,
					getPropertyDefn( COLOR_PALETTE_PROP ) );
		}
		return (ElementPropertyDefn) referencableProperties.get( structureName );
	}
	/**
	 * Returns the list of errors accumulated during a batch operation. These
	 * errors can be serious errors or warnings. Each one is the instance of
	 * <code>ErrorDetail</code>.
	 * 
	 * @return the list of errors or warning
	 */
	public List getAllErrors( )
	{
		return ErrorDetail.convertExceptionList( allExceptions );
	}
	/**
	 * Returns the list of exceptions accumulated during a batch operation. Each