There is no easy fix for that at the moment, I will look into giving the category dropdown a scrollbar as soon as certain height is passed in a future ( probably 2.2 update ) release.
The only alternative is to simply disable the js styling of the dropdowns, and make the normal dropdowns show up.
You can do this by creating your own template. You can read more on how to disable the dropdown styles in this post.
You can add this as temp fix to the styles.css in your theme folder, this does show the whole dropdown, but it looks pretty bad because of the length of the dropdown.
#wpsl-wrap {
overflow:visible !important;
}
Thread Starter
Wil
(@wildevries)
Thanks Tijmen,
I will wait till your update 2.2.