UX improvements

[catherinelu]

• [x] remove grade up / grade down option
• [X] list of students has really odd scrolling
• [x] too many tabs at the top of assessments/grade page
• [x] go to last assignment/exam that has uploads
• [x] go to last assignment/exam that has uploads on statistics page
• [x] hide add people by default
• [ ] add visual indicators to student submit page
• [ ] bug with using brackets and changing parts
• [x] z-index of annotation; covered by footer
• [x] Add People form is hidden by default. Clicking link “Click here to manually add people” (or something) then shows the Add People form
• [ ] After an instructor is done creating an assessment, give instructions for what to do next. Also, make it clear that they cannot edit the assessment after students have submitted
• [x] Change “Assessments” → “Create”
• [x] Get rid of “Submit” on the nav bar. Should be able to visit, but make it clear what it’s used for. “Submit” can be on the “Assessments” page. Some text that explains that students are supposed to submit it.
• [ ] Implement the “released” boolean after creating an assessment. Popover?
• [x] Edit Rubrics button needs to be more obvious
• [ ] First time you see the grade page, have clear instructions and give option of watching a tutorial video.
• [x] “Export CSV” → “Export Grades”
• [ ] Add "View as Student" link, maybe next to the students name (instructors always ask this question to us so it would be good to have)
• [x] More prominent student grade overview
• [x] Released grades email has link to the main grade page