Bug 146976 Save state of the report not correct.
Reproduce: 1) New a library "lib1", add a label "label1" 2) Publish "lib1" 3) New a report "report1", use "lib1" 4) Drag "lib1.label1" into "report1" 5) Go back to "lib1", drop "label1", save and publish again. 6) Go to "report1", refresh the libaray explorer and design. 7) Save "report1" 8) Now, we go back to "lib1" 9) Undo the previous "delete command", "label1" is added back. 10) Save "lib1", and re-publish. 11) Go to "report1", refresh the libaray explorer and design. 12) Save "report1" At this stage, "report1" is saved, but the dirty indicator(*) still displayed in the left side of the report name. I am testing on build N20060613
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/activity/ActivityStack.java
if ( cmd == null )
			return null;
		
		
		String label = cmd.getLabel( );
		assert label != null;
		return label;
	}
	/**
	 * Starts a transaction. All calls to execute( ) add records to the active
	 * transactions. Transactions can nest. Calls to undo( ) or redo( ) are
	 * illegal until the transaction completes. The compound record uses a
	 * generic label.
	 */
	public void startTrans( )
	{
		startTrans( null );
	}
	/**
	 * Starts a transaction. The application provides the message ID for a label
	 * to associate with the transaction.
	 * 
	 * @param label
	 *            localized label for the transaction
	 * 
	 * @see #commit
	 */
	public void startTrans( String label )
	{