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
if ( dialog.open( ) == IDialogConstants.OK_ID )
								{
									returnValue = true;
									newValues = dialog.getSelectedExprValues( );
								}
							}
						}
						else
						{
							MessageDialog.openInformation( null,
									Messages.getString( "SelectValueDialog.selectValue" ), 
									Messages.getString( org.eclipse.birt.chart.reportitem.ui.i18n.Messages.getString( "ChartCubeFilterConditionBuilder.SelectValueDialog.messages.info.selectVauleUnavailable" ) ) ); 
						}
					}
					else
					{
						MessageDialog.openInformation( null,
								Messages.getString( "SelectValueDialog.selectValue" ), 
								org.eclipse.birt.chart.reportitem.ui.i18n.Messages.getString( "ChartCubeFilterConditionBuilder.SelectValueDialog.messages.info.illegalVauleExpr" ) ); 
					}
				}
				else if ( value.equals( actions[1] ) )
				{
					ExpressionBuilder dialog = new ExpressionBuilder( PlatformUI.getWorkbench( )
							.getDisplay( )
							.getActiveShell( ),
							thisCombo.getText( ) );
					if ( expressionProvider == null )
					{
						IExpressionProvider exprProvider = new ChartCubeFilterExpressionProvider( designHandle,