Smaller sequence track size

[cmdcolin]

Fixes #4229

Also moves rowHeight to a volatile, as if it's model, it will use the old size, so old sessions will not get updated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.59%. Comparing base (4f5b046) to head (a5e035a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4257      +/-   ##
==========================================
- Coverage   62.63%   62.59%   -0.04%     
==========================================
  Files        1086     1086              
  Lines       31387    31392       +5     
  Branches     7498     7493       -5     
==========================================
- Hits        19659    19651       -8     
- Misses      11556    11568      +12     
- Partials      172      173       +1     

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[cmdcolin]

this branch

main