Customize the ui "field" for multiple files

[mbabauer]

Is there a way to customize the UI component of this? The single text box is rather unintuitive, and doesn't work when the file names extend past the end of the field. Also, there is no way to remove a file once you added it to the list, at least not that I can tell.

I am thinking it would be nice to have the files in something like a Bootstrap list group.