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/api/elements/SemanticError.java
*/
	public static final String DESIGN_EXCEPTION_MISSING_PAGE_SIZE = MessageConstants.SEMANTIC_ERROR_MISSING_PAGE_SIZE;
	/**
	 * Error code indicating page size can not be specified if page type is not
	 * custom.
	 */
	public static final String DESIGN_EXCEPTION_CANNOT_SPECIFY_PAGE_SIZE = MessageConstants.SEMANTIC_ERROR_CANNOT_SPECIFY_PAGE_SIZE;
	/**
	 * Error code indicating the page margin is larger than the whole page.
	 */
	public static final String DESIGN_EXCEPTION_INVALID_PAGE_MARGINS = MessageConstants.SEMANTIC_ERROR_INVALID_PAGE_MARGINS;
	/**
	 * Error code indicating the report has no master page.
	 */
	public static final String DESIGN_EXCEPTION_MISSING_MASTER_PAGE = MessageConstants.SEMANTIC_ERROR_MISSING_MASTER_PAGE;
	/**
	 * Error code indicating the columns span outside the page content.
	 */
	public static final String DESIGN_EXCEPTION_INVALID_MULTI_COLUMN = MessageConstants.SEMANTIC_ERROR_INVALID_MULTI_COLUMN;
	/**
	 * Error code indicating the element referred is not found.
	 */
	public static final String DESIGN_EXCEPTION_INVALID_ELEMENT_REF = MessageConstants.SEMANTIC_ERROR_INVALID_ELEMENT_REF;
	/**
	 * Error code indicating the structure referred is not found.
	 */
	public static final String DESIGN_EXCEPTION_INVALID_STRUCTURE_REF = MessageConstants.SEMANTIC_ERROR_INVALID_STRUCTURE_REF;
	/**
	 * Error code indicating the JDBC select data set has no SQL statement.
	 */