Bug 188829 Move the item ,the trans of the model don't close.
1:New report design. 2:Add a Embedded image. 3:Add another imge , then drag the second imge to the first position. 4:Change the size of the first image. Expected: Image change the size. Now: Image size don't change.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/command/ContentCommandTest.java
CommandStack stack = designHandle.getCommandStack( );
		outExtendedItem.drop( );
		assertNull( outExtendedItem.getContainer( ) );
		assertNull( innerTable.getContainer( ) );
		assertNull( innerExtendedItem.getContainer( ) );
		assertNull( designHandle.findElement( outExtendedItem.getName( ) ) );
		assertNull( designHandle.findElement( innerTable.getName( ) ) );
		assertNull( designHandle.findElement( innerExtendedItem.getName( ) ) );
		assertNull( designHandle.getElementByID( outExtendedItem.getID( ) ) );
		assertNull( designHandle.getElementByID( innerTable.getID( ) ) );
		assertNull( designHandle.getElementByID( innerExtendedItem.getID( ) ) );
		
		stack.undo( );
		assertNotNull( outExtendedItem.getContainer( ) );
		assertNotNull( innerTable.getContainer( ) );
		assertNotNull( innerExtendedItem.getContainer( ) );
		assertEquals( outExtendedItem, designHandle
				.findElement( outExtendedItem.getName( ) ) );
		assertEquals( innerTable, designHandle.findElement( innerTable
				.getName( ) ) );
		assertEquals( innerExtendedItem, designHandle
				.findElement( innerExtendedItem.getName( ) ) );
		assertEquals( outExtendedItem, designHandle
				.getElementByID( outExtendedItem.getID( ) ) );
		assertEquals( innerTable, designHandle.getElementByID( innerTable
				.getID( ) ) );
		assertEquals( innerExtendedItem, designHandle
				.getElementByID( innerExtendedItem.getID( ) ) );
	}
	class MyGroupListener implements Listener