Fix positioning of scalebar tooltips, overview scalebar plotting, and refName label positioning when displaying many regions

[cmdcolin]

With this change

#1556
#1532
Also see refname label positioning issue (X not flush with boundary) in #1556

I also make the minimum block width smaller to make it so realistically human sized chromosomes such as 20-22 of human are displayed even when zoomed out

The refname label positioning was fixed by updates to calculateStaticBlocks/calculateDynamicBlocks: only needs to add interregionpaddingwidth when it is a content block

This PR also adds ellided blocks to the overview bar so that we avoid rainbow-of-small-displayed regions, and changes it from paper with margins to exact width divs

Note that this is still not perfect: it is visible from the screenshot that the chr1 overview scale bar polygon does not match up perfectly with the end of the display and the chr1 displays some negative offsets in an actually visible region

However, these changes do improve the general situation

[cmdcolin]

To test, here is a share URL with lots of displayed regions http://localhost:3000/?config=test_data%2Fconfig_demo.json&session=share-BZ3qCPhTw6&password=lq7S7

[codecov]

Codecov Report

Merging #1587 (c36e624) into master (5d3419e) will decrease coverage by 0.09%.
The diff coverage is 75.24%.

@@            Coverage Diff             @@
##           master    #1587      +/-   ##
==========================================
- Coverage   59.40%   59.31%   -0.10%     
==========================================
  Files         434      434              
  Lines       19612    19613       +1     
  Branches     4591     4595       +4     
==========================================
- Hits        11651    11633      -18     
- Misses       7667     7686      +19     
  Partials      294      294              

Impacted Files	Coverage Δ
plugins/dotplot-view/src/DotplotView/model.ts	45.23% <0.00%> (-1.28%)	⬇️
.../src/BaseLinearDisplay/components/LinearBlocks.tsx	88.88% <ø> (ø)
...c/LinearGenomeView/components/LinearGenomeView.tsx	79.16% <ø> (ø)
packages/core/util/Base1DViewModel.ts	71.54% <21.05%> (-2.63%)	⬇️
...s/linear-genome-view/src/LinearGenomeView/index.ts	80.87% <84.21%> (-3.23%)	⬇️
packages/core/util/blockTypes.ts	87.30% <85.71%> (+15.87%)	⬆️
...c/LinearGenomeView/components/OverviewScaleBar.tsx	93.05% <91.66%> (-1.14%)	⬇️
packages/core/util/calculateDynamicBlocks.ts	96.15% <100.00%> (-1.93%)	⬇️
packages/core/util/calculateStaticBlocks.ts	100.00% <100.00%> (ø)
packages/core/util/index.ts	84.01% <100.00%> (+0.05%)	⬆️
... and 8 more

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[cmdcolin]

This one is maybe at a good place now. There is a fair amount of logic to make sure to carefully account for inter region padding blocks,etc. it's tricky but must be taken into account when zoomed out. I made some tests to check some of the expectations of this inter region padding block being taken into account when both zoomed out far and zoomed in close in various regions of hg38 which includes ellided blocks in the middle

[cmdcolin]

Standardize on the beforeFirst and afterLast interregionpaddingblocks

[cmdcolin]

following discussion in meeting, I restored the "boundary" blocks to calculateDynamicBlocks (matching calculateStaticBlocks) and then make a special calculation to avoid them in dd76c3e

[cmdcolin]

I think this is probably good to go.. if anyone is interested in reviewing feel free but might merge soon