Select of type "multiple" is styled incorrect

[yo-l1982]

Adding a css selector in core admin-css to match a multiple select would be a nice feature, as for now the output of this will look like a input/text, and a user will have to add its own custom css-file just to style this type of select to make it usable.
Selects is styled generally and set to 2em height to match the most common select type.

Code that shows wrong.

<select multiple="multiple">
</select>

My suggestion to a solution is to add this into admin css:

#wpcontent select[multiple] {
   height: 4em;
}

[scribu]

Core uses checkbox lists instead of multiple selects. They're much more user friendly.

Maybe you should do the same.

[scribu]

Also, duplicate of #10331