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
if ( defn != null
				&& defn.isKindOf( MetaDataDictionary.getInstance( ).getElement(
						ReportDesignConstants.TEMPLATE_ELEMENT ) ) )
		{
			
			
			DesignElement container = this;
			int slot = slotID;
			while ( container != null )
			{
				if ( ( container instanceof Module && slot == Module.COMPONENT_SLOT )
						|| container instanceof Library )
					return false;
				slot = container.getContainerSlot( );
				container = container.getContainer( );
			}
			if ( module instanceof Library )
				return false;
		}
		return true;
	}
	/**
	 * Checks whether the <code>content</code> can be inserted to the slot
	 * <code>slotId</code> in another element <code>container</code>.
	 * 
	 * @param module
	 *            the module
	 * @param container
	 *            the container element