Autocomplete: Incorrect scrolling of items when zoomed

You can see that bug if you zoom on the demo of the ui.autocomplete/scrollable section. If go down on the selection list with the arrow key, every N times (N depends on the zoom level) the focus will go to an option who's mostly outside of the scrollable panel (you can just see the overlay around the option, but not the text of the option). Outside of the demo, because your font, police size etc... are not the same as in the demo, you have to find the exact value for the css attribute max-height wich will not cause that bug in defaut zoom.