In the new grading interface for Forums in 3.8, there is a number box (input=number) to enter a grade.

It has up and down arrows, but there is no client side checking or feedback about allowed values, until you submit a bad value, at which point it will tell you you need to be between 0 and whatever the set max grade is.

It would make it a lot cleaner if the template /grade/templates/grades/grader/gradingpanel/point.mustache set min and max values, which is supported by most major browsers (https://caniuse.com/#feat=input-number)