Click on configure for a Job. The UI appears to stretch unnecessarily and creates horizontal scroll bar usage to see page. It appears to happen with text box not wrapping text in build section. In our case, this is "execute shell" build step. If we remove long text, UI will update and no horizontal scroll bar is enabled. This is new bug, appeared when we updated from 1.579 to 1.598. Updated again to 1.601 and bug is still present.

More of the same:
When the text in one box is long - all other text boxes are also streached out. Add a 13" screen and it's all over the place. Adding images.