1 - Edit config.xml for image_Select.
On fixed_width attribute make deault to be empty string.
<default></default>
2 - Apply image_select theme to a question.
3 - Advanced attributes will not be loaded.

On the backend a 500 error will be thrown,

• CHtml::numberField parameter 1 expected string and array given.
• application/views/admin/survey/Question/advanced_settings_view.php

// Integer
                    case 'integer':
                        echo CHtml::numberField($aAttribute['name'],$aAttribute['value'],array(
                            'class'=>"form-control",
                            'disabled'=>$readonly,
                            'step'=>1,
                            'pattern'=>'\d+',
                            'min'=>(isset($aAttribute['min'])?$aAttribute['min']:1),
                            'max'=>(isset($aAttribute['max'])?$aAttribute['max']:null),
                            'aria-describedby'=>"help{$aAttribute['name']}",
                        ));
                        break;