code: public static function iconButton($glyph, $options = [])
      {
          $iOptions = ArrayHelper::remove($options, 'icon', []);
          Ui::addCssClasses($options, ['icon']);
          return static::button(static::icon($glyph, $iOptions), $options);
      }
docs: Generates an [icon button](http://semantic-ui.com/elements/button.html#icon)
  
  @param string $glyph the glyphicon name to be used -ie "cloud"
  @param array $options the tag options in terms of name-value pairs. These will be rendered as
  the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
  
  @return string the generated icon button tag