So called "new" interface completely unusable
"steps to reproduce". There are no steps. Call a random translation page like this: [1]. Done. You will see the result in the screenshot.
"the new interface doesn't support old computers and small screens". This is a 1680x1050 screen and a 2.5 GHz quad-core. The only thing is that I did my test with Internet Explorer 9 (on purpose) and I shrinked the browser window (on purpose). Internet Explorer 9 is not old in any way. Such a simple tool (all it does is editing single lines of text) must work in a 2 years old browser under all circumstances.
"does the placeholder keyword in the normal Vector search bar work for you?" Sure it does. I would have filled a bug report years ago. "It should stay on the background and disappear as soon as you type something else." The text in the filter input does the same. It goes away when I focus the field. That's not the problem. The problem is that the default text is used to filter the list right from the start. Every time.