fixes issue when setting properties from $field don't set

[iBotPeaches]

When using the Dropdown Widget regularly, you pass the values as properties to Dropdown as shown here - https://github.com/zelenin/yii2-semantic-ui/blob/master/widgets/ActiveField.php#L87

When you use dropdownList as part of a field in a form, all those options are passed into $options which is never set to the properties therefore you can't use disabled/search/etc.

To replicate

<?= $form->field($model, 'foo')->dropDownList(['test' => 'foo'], ['disabled' => true]); ?>

The field won't be disabled.

Not sure if this is the best fix or moving the change to the individual classes like Dropdown

[zelenin]

Create $disabled like $multiple here https://github.com/iBotPeaches/yii2-semantic-ui/blob/bug/field-options/widgets/ActiveField.php#L86

I don't think that foreach in InputWidget is a good idea.

[iBotPeaches]

Okay thanks for comment. I abstracted all variables used in Dropdown to that method.

[zelenin]

Cool. Thanks!