It would be helpful to have a collapsible tree view, or a better way to scroll through the SQL view on the Page Performance Monitor (CTRL+SHIFT+K). If there are multiple queries the small window view can become unreadable only displaying a small sliver in which the query is displayed, and the list extends far below the PPM window rendering the bottom of the list useless.
In the attached screen shot, I am using Chrome Version 68.0.3440.106 (Official Build) (64-bit)
This will be treated as a bug as the scroll bar should occur on that area of the screen. This will be placed in backlog for prioritisation and resolution.
Could you confirm whether this issue still exists in 7.0 release and above as I see a scroll bar now when investigating this but may not have the complexity of page to show the issue?
Highlighted version of screen shot for clarity