Tweaks to the new layout

[Redande]

• translations to some untranslated components
• use same color schemes for courses and modules
• Tooltip: In English: ECTS -> ECTS credits
• Add space between number of hours and an abbreviation: 50h -> 50 h
• Background svg color corresponds to background color in study-modules subpage

[codecov[bot]]

Codecov Report

Merging #1202 (d274134) into master (d3c0c04) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1202   +/-   ##
=======================================
  Coverage   64.15%   64.15%           
=======================================
  Files         124      124           
  Lines        5306     5306           
  Branches     1234     1234           
=======================================
  Hits         3404     3404           
  Misses       1773     1773           
  Partials      129      129           

Flag	Coverage Δ
backend	64.15% <ø> (ø)

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