fix: issue with async nav lists not updating correctly

[jake-bassett]

Description

This PR fixes an issue with asynchronously created navItem lists not updating after initial load.

[codecov]

Codecov Report

Merging #1032 (3cc2bae) into main (5819213) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1032   +/-   ##
=======================================
  Coverage   85.06%   85.06%           
=======================================
  Files         820      820           
  Lines       16864    16865    +1     
  Branches     2190     2190           
=======================================
+ Hits        14345    14346    +1     
  Misses       2488     2488           
  Partials       31       31           

Impacted Files	Coverage Δ
...onents/src/navigation/navigation-list.component.ts	84.61% <100.00%> (+0.61%)	⬆️

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[github-actions]

Unit Test Results

    4 files  ±0  262 suites  ±0   18m 51s ⏱️ + 2m 5s
945 tests ±0  945 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
952 runs  ±0  952 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 1a5f070. ± Comparison against base commit 5819213.