fix: use react-router to properly handle basepaths for internal links

[brian-smith-tcril]

No description provided.

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (f3637b5) 66.96% compared to head (a6dad89) 67.23%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #422      +/-   ##
==========================================
+ Coverage   66.96%   67.23%   +0.26%     
==========================================
  Files          25       25              
  Lines         339      354      +15     
  Branches       78       84       +6     
==========================================
+ Hits          227      238      +11     
- Misses        110      113       +3     
- Partials        2        3       +1     

Files	Coverage Δ
src/studio-header/utils.js	100.00% <ø> (ø)
src/studio-header/CourseLockUp.jsx	87.50% <80.00%> (-12.50%)	⬇️
src/studio-header/NavDropdownMenu.jsx	91.66% <88.88%> (-8.34%)	⬇️
src/studio-header/MobileMenu.jsx	81.81% <33.33%> (-18.19%)	⬇️

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