Fix viewing soft/hardclip indicator in some regions

[cmdcolin]

Small detail, but we are able to capture a clip indicator when it goes "past the feature end" (the soft clips are technically not stored interbase, so to get them, we need to go past the feature end)

demo

main
https://jbrowse.org/code/jb2/main/?config=test_data%2Fvolvox%2Fconfig.json&session=share-fBa97hv8H8&password=YL7ng

this branch
https://jbrowse.org/code/jb2/clip_indicator_cliff/?config=test_data%2Fvolvox%2Fconfig.json&session=share-fBa97hv8H8&password=YL7ng

[codecov]

Codecov Report

Merging #2951 (a14a843) into main (0738c41) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2951      +/-   ##
==========================================
- Coverage   60.70%   60.68%   -0.02%     
==========================================
  Files         601      601              
  Lines       27341    27341              
  Branches     6654     6654              
==========================================
- Hits        16597    16592       -5     
- Misses      10435    10440       +5     
  Partials      309      309              

Impacted Files	Coverage Δ
...ments/src/SNPCoverageAdapter/SNPCoverageAdapter.ts	56.37% <100.00%> (ø)
...inearGenomeView/components/RefNameAutocomplete.tsx	81.81% <0.00%> (-3.04%)	⬇️
packages/core/TextSearch/TextSearchManager.ts	89.18% <0.00%> (-2.71%)	⬇️
...ckages/core/pluggableElementTypes/RpcMethodType.ts	83.33% <0.00%> (-2.09%)	⬇️

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