Sort and color course cards based on study modules

[Redande]

Sort course cards and color their headings based on their study module in the new courses subpage

[codecov[bot]]

Codecov Report

Merging #1096 (bdb8072) into master (2042631) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1096   +/-   ##
=======================================
  Coverage   67.51%   67.51%           
=======================================
  Files         118      118           
  Lines        4710     4710           
  Branches     1017     1017           
=======================================
  Hits         3180     3180           
  Misses       1413     1413           
  Partials      117      117           

Flag	Coverage Δ
backend	67.49% <ø> (ø)

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