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
else
			{
				
				value = getPropertyFromParent( module, prop );
			}
			if ( value != null )
				return value;
		}
		
		
		if ( prop.isStyleProperty( ) )
		{
			value = getPropertyFromSelfSelector( module, prop );
			if ( value != null )
				return value;
			
			
			value = getPropertyFromSlotSelector( module, prop );
			if ( value != null )
				return value;
		}
		return null;
	}
	/**
	 * Gets a property value given its definition. This version does the full
	 * property search as defined by the given derived component. That is, it
	 * gets the "effective" property value. The definition can be for a system
	 * or user-defined property.
	 * <p>
	 * The search won't search up the inheritance hierarchy if the non-style