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
* that record onto the undo stack. This method should only be called when
	 * {@link #canUndo()}returns <code>true</code>.
	 */
	public void redo( )
	{
		
		assert canRedo( );
		
		ActivityRecord record = (ActivityRecord) redoStack.pop( );
		assert record.getState( ) == ActivityRecord.UNDONE_STATE;
		record.redo( );
		record.setState( ActivityRecord.REDONE_STATE );
		
		
		
		undoStack.push( record );
		record.performPostTasks( transStack );
		
		sendNotifcations( new ActivityStackEvent( this,
				ActivityStackEvent.REDONE ) );
	}
	/**
	 * Determines if the record stack has a record to undo. There is a record to
	 * undo if
	 * <nl>
	 * <li>no transaction is active,</li>
	 * <li>the undo stack is not empty, and
	 * <li>the top record can be undone.</li>
	 * </nl>
	 *