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
* Error code indicating the custom color name is the same as CSS standard
	 * color name.
	 */
	public static final String DESIGN_EXCEPTION_INVALID_CUSTOM_COLOR_NAME = MessageConstants.SEMANTIC_ERROR_INVALID_CUSTOM_COLOR_NAME;
	/**
	 * Error code indicating the custom color name is duplicate.
	 */
	public static final String DESIGN_EXCEPTION_DUPLICATE_CUSTOM_COLOR_NAME = MessageConstants.SEMANTIC_ERROR_DUPLICATE_CUSTOM_COLOR_NAME;
	/**
	 * The extension name for the extended item is not found in our meta.
	 */
	public static final String DESIGN_EXCEPTION_EXTENSION_NOT_FOUND = MessageConstants.SEMANTIC_ERROR_EXTENSION_NOT_FOUND;
	/**
	 * The extension name for the extended item is not defined.
	 */
	public static final String DESIGN_EXCEPTION_MISSING_EXTENSION = MessageConstants.SEMANTIC_ERROR_MISSING_EXTENSION;
	/**
	 * Error code indicating to copy one property is forbidden.
	 */
	public static final String DESIGN_EXCEPTION_PROPERTY_COPY_FORBIDDEN = MessageConstants.SEMANTIC_ERROR_PROPERTY_COPY_FORBIDDEN;
	/**
	 * Error code indicating to copy one column is forbidden.
	 */
	public static final String DESIGN_EXCEPTION_COLUMN_COPY_FORBIDDEN = MessageConstants.SEMANTIC_ERROR_COLUMN_COPY_FORBIDDEN;
	/**
	 * Error code indicating to paste one column is forbidden.
	 */
	public static final String DESIGN_EXCEPTION_COLUMN_PASTE_FORBIDDEN = MessageConstants.SEMANTIC_ERROR_COLUMN_PASTE_FORBIDDEN;
	/**
	 * Error code indicating to paste one column is forbidden.