Hi, I'm the reviewer who made the initial comments about the widget width below. :)
This is more like it! Three last comments though: -
Is there any chance you could reduce the width a little more? Perhaps you could do this by shortening the 'copy to clipboard' string on the button to just 'copy'? Something around 300-320px wide would do the trick I think.
Secondly, there definitely seems to be an issue with grabbing either the length slider or the resize corner. If the mouse moves too fast, the element slips off the mouse and is left behind - if you see what I mean? The only way to guarantee the slide or resize is to do the movement slowly. Now I'm not sure how this could be, as a 'grab' element should be just that, with no room for error with the system, but I do not get this behavior with any other screen element on any other app?
One last comment would be to reduce the brightness on the upper side of the preferences flip side in order to increase text legibility for low vision users.