Add disable arg or attributes arg to wp_dropdown_categories() & wp_dropdown_pages()

[wpsmith]

It would be beneficial to be able to add disabled="disabled" attribute to the select tag or add multiple attributes to the select tag.

Related: #20156, #20167

Disabled arg for wp_dropdown_categories()

Extra attributes for wp_dropdown_categories()

Disabled arg for wp_dropdown_pages()

Extra attributes for wp_dropdown_pages()

+1 we need it on all dropdown functions.

An array of attribute could be passed. Like:

$args = array(

'attrs' = array(

'multiple' => 'multiple',
'disable' => 'disabled'

)

)

It will allow users to add extra attribute like classes or any other html 5 attributes on the dropdown.