Bug 312859 The list of operator for Chart filter does not provide 30 visible items
chart/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/dialogs/ChartCubeFilterConditionBuilder.java
int index = table.getSelectionIndex( );
					if ( index > -1 )
					{
						valueList.remove( index );
						tableViewer.refresh( );
						if ( valueList.size( ) > 0 )
						{
							if ( valueList.size( ) <= index )
							{
								index = index - 1;
							}
							table.select( index );
						}
						updateButtons( );
					}
					else
					{
						delBtn.setEnabled( false );
					}
				}
			}
			public void keyReleased( KeyEvent e )
			{
			}
		} );
		table.addMouseListener( new MouseAdapter( ) {
			public void mouseDoubleClick( MouseEvent e )
			{
				IStructuredSelection selection = (IStructuredSelection) tableViewer.getSelection( );
				if ( selection.getFirstElement( ) != null