grading results tab for students

[jiachen247]

I did most of the heavy lifting but have yet to make it pretty.
Lets merge the others first to prevent merge conflicts:)

[coveralls]

Pull Request Test Coverage Report for Build 1072

• 8 of 10 (80.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.06%) to 26.075%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/components/assessment/GradingResult.tsx	5	7	71.43%

Totals
Change from base Build 1067:	0.06%
Covered Lines:	921
Relevant Lines:	2993

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💛 - Coveralls

[rrtheonlyone]

Great work! This is a really useful feature :)

Some minor things:

(1) The last line - change to "Graded by avenger name on date"
(2) Why does it say invalid date?

[jiachen247]

have fixed both issue. It was an invalid date because in the mocks gradedAt was an empty string. Have updated them to be valid timestamps.

This is how it looks now.

[jiachen247]

lets try to merge the others first then we can rebase and sort out the conflicts all at one go :)

[rrtheonlyone]

Yup agreed @jiachen247!

[rrtheonlyone]

LGTM 👍