Make everything usable on mobile!!

[tektaxi]

More specifically,

• calculated grades get cut off with a "..." we should change that so calculated grades are actually visible.
• allow users to edit the percentage on mobile, or edit their grade somehow (our ease of visibility update removed this feature indavertently)
• you have to scroll horizontally to view the schedule correctly which is weird
• the reports viewer is strange, we should just migrate to using the default browser viewer