Thanks for the suggestion. Since we don't typically exceed the width of the list it looks a bit strange when everything is larger than needed.
Instead we've just allowed for the suggestions to autosize themselves. We would have preferred to allow for them to each rather display on a single line with an ellipsis (the same way the normal drop down list displays when you click the down arrow) but we couldn't get that to work at all.
This works for the suggestions but I have no idea why it doesn't apply to the normal list items as well?