Restructure Position Paper Grade System

[shaynak]

Old issue: calculateScore in ChairPaperView determines what score is sent to the backend for each rubric category through the following calculation: (category_weight / 5) * score (score is a number between 1 and 5). However, this poses issues & raises a 400 bad request error when category_weight is not divisible by 5, because an integer is no longer sent back to the backend. We need to find a way to always send back an integer, either via rounding or by changing the way scores are represented on the backend (maybe we score from 1-5 back and do any calculations for a total score on the frontend).

Upon review of this issue, it seems like there are a number of issues with how the data for papers is stored/calculated and it's worth taking more time to work on it:

• the function calculateScore (and other similar ones) is copy pasted in multiple files which is pretty ridiculous. Should be a util function
• said function should be changed to have more intuitive logic. (Divide score/5 to get a percentage they got, then multiply that by weight - same math, better flow)
• we are sending these weird divided by 5 values back to the back end in PaperGradeTable which is also silly. We should just store 1-5 scores and do the fancy calculations in the views.