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_INCONSITENT_TABLE_COL_COUNT = MessageConstants.SEMANTIC_ERROR_INCONSISTENT_TABLE_COL_COUNT;
	/**
	 * Error code indicating the table has inconsistent column count because of
	 * drop effects of some cells. The column count should match the maximum
	 * cell count in header, detail, and foot slots.
	 */
	public static final String DESIGN_EXCEPTION_INCONSITENT_TABLE_COL_COUNT_WITH_DROP = MessageConstants.SEMANTIC_ERROR_INCONSISTENT_TABLE_COL_COUNT_COZ_DROP;
	/**
	 * Error code indicating the grid has inconsistent column count. The column
	 * count should match the maximum cell count in rows.
	 */
	public static final String DESIGN_EXCEPTION_INCONSITENT_GRID_COL_COUNT = MessageConstants.SEMANTIC_ERROR_INCONSISTENT_GRID_COL_COUNT;
	/**
	 * Error code indicating the table has overlapping cells. Cell is forbidden
	 * to overlap other cells.
	 */
	public static final String DESIGN_EXCEPTION_OVERLAPPING_CELLS = MessageConstants.SEMANTIC_ERROR_OVERLAPPING_CELLS;
	/**
	 * Error code indicating the table has a conflict among dropping cells in
	 * group header of the table.
	 */
	public static final String DESIGN_EXCEPTION_INCONSITENT_DROP_HEADINGS = MessageConstants.SEMANTIC_ERROR_INCONSISTENT_DROP_HEADINGS;
	/**
	 * Error code indicating the master page size is invalid. The size should be
	 * positive.
	 */
	public static final String DESIGN_EXCEPTION_INVALID_PAGE_SIZE = MessageConstants.SEMANTIC_ERROR_INVALID_PAGE_SIZE;
	/**
	 * Error code indicating the page size is missing when page type is custom.