Use superRenderProps and superTrackMenuItems for better simulated inheritance model

[cmdcolin]

Fixes #2222

[codecov]

Codecov Report

Merging #2226 (bf455f0) into main (aad6c52) will increase coverage by 0.00%.
The diff coverage is 81.16%.

@@           Coverage Diff           @@
##             main    #2226   +/-   ##
=======================================
  Coverage   62.90%   62.90%           
=======================================
  Files         484      484           
  Lines       22728    22720    -8     
  Branches     5159     5154    -5     
=======================================
- Hits        14297    14292    -5     
+ Misses       8160     8158    -2     
+ Partials      271      270    -1     

Impacted Files	Coverage Δ
...c/BaseChordDisplay/models/BaseChordDisplayModel.ts	73.46% <0.00%> (ø)
...gins/filtering/src/LinearFilteringDisplay/model.js	4.76% <0.00%> (-0.24%)	⬇️
...arative-view/src/LinearComparativeDisplay/index.ts	5.88% <0.00%> (ø)
...comparative-view/src/LinearSyntenyDisplay/index.ts	25.00% <0.00%> (ø)
...roducts/jbrowse-desktop/src/sessionModelFactory.ts	11.90% <0.00%> (ø)
...omparative-view/src/LinearComparativeView/model.ts	7.52% <50.00%> (-1.95%)	⬇️
...ments/src/LinearSNPCoverageDisplay/models/model.ts	66.66% <76.47%> (+0.70%)	⬆️
.../pluggableElementTypes/models/BaseDisplayModel.tsx	76.19% <100.00%> (ø)
...ore/pluggableElementTypes/models/BaseTrackModel.ts	33.72% <100.00%> (+0.76%)	⬆️
packages/core/util/tracks.ts	66.66% <100.00%> (ø)
... and 21 more

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[cmdcolin]

requested @elliothershberg for review, similar concept to the menuItems getter to menuItems function change that was done in the bookmarks PR

[garrettjstevens]

I agree this way of doing the track menu items feels better.