Bonuspoints: Display normal points and the total ones (including bonus points) seperately in students tab and exported tables

• Add another column in the students tab, where the points without bonus are displayed for each student
• Add to the note in the RWTHonline export file, the number of points achieved without bonus. Same for manual students.
• Grading scheme export: Do not show maximum points
• Checkmark if bonus points should be added such that you can pass the exam. In this case, in the export of rwth online also change the comment accordingly