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
public long getBaseId( )
	{
		return baseId;
	}
	/**
	 * Clears local properties of the element.
	 */
	public void clearAllProperties( )
	{
		this.name = null;
		this.extendsRef = null;
		propValues.clear( );
	}
	/**
	 * Determines whether this element and its contents are managed by
	 * namespace. If this element is a pending node and not in any module, or it
	 * is contained in a slot that is not managed by namespace, then return
	 * false. Otherwise true.
	 * 
	 * @param slotID
	 *            the slot ID in this element
	 * @return true if this element and its contents are managed by namespace,
	 *         otherwise false
	 */
	public boolean isManagedByNameSpace( int slotID )
	{
		
		if ( getRoot( ) == null )
			return false;