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
}
		return isNewPageValid;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.forms.editor.FormEditor#editorDirtyStateChanged()
	 */
	public void editorDirtyStateChanged( )
	{
		super.editorDirtyStateChanged( );
		markPageStale( );
	}
	private void markPageStale( )
	{
		
		IFormPage currentPage = getActivePageInstance( );
		if ( !( currentPage instanceof IReportEditorPage ) )
		{
			return;
		}