Chrome: Fix adding new categories and terms

[youknowriad]

closes #2582

Not sure where this regressed, but this PR fixes the form and also moves the newly inserted term to the top.

Testing instructions

• Try creating a new category
• It should be added at the top of the list and selected automatically

[codecov]

Codecov Report

Merging #2606 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master    #2606   +/-   ##
=======================================
  Coverage   31.49%   31.49%           
=======================================
  Files         177      177           
  Lines        5398     5398           
  Branches      943      943           
=======================================
  Hits         1700     1700           
  Misses       3128     3128           
  Partials      570      570

Impacted Files	Coverage Δ
...ebar/post-taxonomies/hierarchical-term-selector.js	0% <0%> (ø)	⬆️

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