Fix connection tracks not showing up in track selector

[garrettjstevens]

Fixes a bug introduced in #1398. This makes the connection track filtering logic the same as the regular track filtering.

Fixes #1424

[codecov]

Codecov Report

Merging #1431 (4e2e1fa) into master (ee3d90c) will increase coverage by 0.00%.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master    #1431   +/-   ##
=======================================
  Coverage   59.60%   59.61%           
=======================================
  Files         425      425           
  Lines       18990    18997    +7     
  Branches     4445     4446    +1     
=======================================
+ Hits        11319    11325    +6     
  Misses       7382     7382           
- Partials      289      290    +1     

Impacted Files	Coverage Δ
...ement/src/HierarchicalTrackSelectorWidget/model.js	69.41% <0.00%> (-6.23%)	⬇️
...lignments/src/BamAdapter/BamSlightlyLazyFeature.ts	79.24% <0.00%> (+1.88%)	⬆️
...s/svg/src/SvgFeatureRenderer/components/Chevron.js	89.74% <0.00%> (+10.25%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ee3d90c...4e2e1fa. Read the comment docs.

[cmdcolin]

lgtm...I guess my only thought is that now many different areas of the code like showTrack, and this, etc. here have to be concerned with looping through displays...wonder if it can be made more simple somehow