Bug 142691 Switch between the window of two design file. The display of the binding list is abnormal.
Description: Switch the window of between two design file. The display of the binding list is abnormal. Step to reproduce: please refer to the screenshot Actual result: The first design files binding data set list will display the second ones.
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.IPartListener#partOpened(org.eclipse.ui.IWorkbenchPart)
	 */
	public void partOpened( IWorkbenchPart part )
	{
	}
	/**
	 * Tell me, i am activated.
	 * 
	 */
	public void handleActivation( )
	{
		if ( fIsHandlingActivation )
			return;
		fIsHandlingActivation = true;
		try
		{
			
			
		}
		finally
		{
			fIsHandlingActivation = false;
		}
	}
	/**
	 * check the input is modify by file system.