Fix mouseovers/click handlers after "force load" button pressed

[cmdcolin]

This is probably a fix for #2130

SVG and pileup tracks have been updated

The blockLayoutFeatures concept is completely removed now

[codecov]

Codecov Report

Merging #2131 (24851e5) into main (ec358f4) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2131      +/-   ##
==========================================
- Coverage   61.99%   61.98%   -0.02%     
==========================================
  Files         476      476              
  Lines       22781    22773       -8     
  Branches     5351     5348       -3     
==========================================
- Hits        14123    14115       -8     
  Misses       8377     8377              
  Partials      281      281              

Impacted Files	Coverage Δ
.../src/PileupRenderer/components/PileupRendering.tsx	78.21% <100.00%> (ø)
...aseLinearDisplay/models/BaseLinearDisplayModel.tsx	77.00% <100.00%> (-0.72%)	⬇️
...g/src/SvgFeatureRenderer/components/SvgOverlay.tsx	46.57% <100.00%> (-1.43%)	⬇️

---

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 ec358f4...24851e5. Read the comment docs.