Display full descendant count on taxonomy tag list page [FC-0036]

[bradenmacdonald]

Implements openedx/modular-learning#191

Depends on openedx/openedx-core#156

This updates the UI to display the total number of descendant tags for each tag, not just the direct number of children.

Before	After

Private ref: FAL-3655

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b234344) 89.02% compared to head (84d4363) 89.02%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #826   +/-   ##
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  Coverage   89.02%   89.02%           
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  Files         545      545           
  Lines        9585     9585           
  Branches     2054     2054           
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  Hits         8533     8533           
  Misses       1005     1005           
  Partials       47       47           

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[pomegranited]

👍 with one test request.

• I tested this on my devstack with openedx/openedx-core#156
  • Navigated to the taxonomies list and selected a taxonomy
  • Ensured that the descendant counts are showing as expected next to each tag in the tree.
• I read through the code
• I checked for accessibility issues by using my keyboard to navigate.
• Includes documentation N/A
• User-facing strings are extracted for translation N/A

[xitij2000]

Looks good!

[openedx-webhooks]

@bradenmacdonald 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.

[bradenmacdonald]

Thanks @xitij2000 !