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
IEditorPart activeEditor = ( (FormEditor) getMultiPageEditor( ) ).getActivePageInstance( );
			
			if ( activeEditor != null )
			{
				ISelectionProvider selectionProvider = activeEditor.getSite( )
						.getSelectionProvider( );
				if ( selectionProvider != null )
					return selectionProvider.getSelection( );
			}
			return globalSelection;
		}
		/*
		 * (non-Javadoc) Method declared on <code> ISelectionProvider </code> .
		 */
		public void setSelection( ISelection selection )
		{
			IEditorPart activeEditor = ( (FormEditor) getMultiPageEditor( ) ).getActivePageInstance( );
			if ( activeEditor != null )
			{
				ISelectionProvider selectionProvider = activeEditor.getSite( )
						.getSelectionProvider( );
				if ( selectionProvider != null )
					selectionProvider.setSelection( selection );
			}
			else
			{
				this.globalSelection = selection;
				fireSelectionChanged( new SelectionChangedEvent( this,
						globalSelection ) );
			}