Include excluded exercises in summary; other minor frontend changes

[mipyykko]

Exercises with max_points = 0 are now shown in grey background.

Fixed progress styling bug; added some containers for elements that shouldn't be attached to document root. Also updated next and some other deps.

[codecov[bot]]

Codecov Report

Merging #1183 (f32bc59) into master (aa1ecb2) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1183   +/-   ##
=======================================
  Coverage   65.50%   65.50%           
=======================================
  Files         124      124           
  Lines        5221     5221           
  Branches     1160     1160           
=======================================
  Hits         3420     3420           
  Misses       1677     1677           
  Partials      124      124           

Flag	Coverage Δ
backend	65.50% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...r/common/userPoints/exerciseCompletionFunctions.ts	55.47% <ø> (ø)
backend/graphql/Completion/index.ts	100.00% <ø> (ø)
backend/graphql/Course/index.ts	100.00% <ø> (ø)
backend/graphql/StudyModule/index.ts	100.00% <ø> (ø)
backend/graphql/User/index.ts	100.00% <ø> (ø)
backend/graphql/index.ts	100.00% <ø> (ø)
...nd/bin/kafkaConsumer/common/userPoints/saveToDB.ts	94.73% <100.00%> (ø)

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