The W3C CSS validator throws Value Error : overflow normal is not a overflow value : normal.
normal is not a valid value for overflow, as browsers currently cannot parse it they fall back to the default visible, thus change it to visible.
See https://developer.mozilla.org/en-US/docs/Web/CSS/overflow

Paste phui-oi-list-view.css into https://jigsaw.w3.org/css-validator/ and read some CSS docs.

Also, visit a page showing a PHUIObjectItemView, like the /phame/post/ page, and
have a object with a veeeeeery long name, and see absolutely no difference A/B,
both on desktop, medium and small screens.