Manually adjust feature height and spacing on alignments track

[cmdcolin]

This allows both manually adjusting feature height and spacing between features via toggling pitchY to 1 using a track setting

Example

For #1693

[codecov]

Codecov Report

Merging #1721 (8ee6560) into master (e2f5843) will decrease coverage by 0.08%.
The diff coverage is 16.66%.

@@            Coverage Diff             @@
##           master    #1721      +/-   ##
==========================================
- Coverage   58.82%   58.73%   -0.09%     
==========================================
  Files         448      449       +1     
  Lines       20754    20785      +31     
  Branches     4919     4924       +5     
==========================================
+ Hits        12208    12209       +1     
- Misses       8239     8269      +30     
  Partials      307      307              

Impacted Files	Coverage Δ
...src/LinearPileupDisplay/components/FilterByTag.tsx	5.00% <ø> (ø)
...s/src/LinearPileupDisplay/components/SortByTag.tsx	7.14% <ø> (ø)
...ns/alignments/src/PileupRenderer/PileupRenderer.ts	65.75% <0.00%> (-0.23%)	⬇️
...inearPileupDisplay/components/SetFeatureHeight.tsx	5.88% <5.88%> (ø)
...lugins/alignments/src/LinearPileupDisplay/model.ts	70.28% <26.66%> (-4.57%)	⬇️
...pluggableElementTypes/renderers/BoxRendererType.ts	85.13% <100.00%> (+0.20%)	⬆️
...inearGenomeView/components/RefNameAutocomplete.tsx	89.36% <0.00%> (-4.26%)	⬇️

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[cmdcolin]

Any objection? I think the functionality can be good

Inspired by https://twitter.com/lh3lh3/status/1362921612690010118 has a nice compact visualization but also had that previous issue open for making compact reads

[rbuels]

seems fine. wouldn't setting these things be a little bit nicer in the sidebar than with dialogs though, so you can see the changes as you tweak it?

[cmdcolin]

It is difficult to get live update right. Our live update can be quite slow and really clobbers the system with too much activity, see this new issue for example #1730 it is slow to drag the height of the track down because it so rapidly produces re-rendering requests that go through the whole rpc pipeline that it ends up being slow