Move "mouseover" config from BaseLinearDisplay to LinearBasicDisplay display

[garrettjstevens]

This is a proposal to move the "mouseover" config slot from the BaseLinearDisplay to LinearBasicDisplay. There are some displays, like LinearWiggleDisplay, that extend from the config of BaseLinearDisplay but don't have the same concept of mouseover. This way those types of displays don't have a "mouseover" slot in the config editor that doesn't do anything.

[rbuels]

good to merge as soon as conflicts are resolved

[cmdcolin]

Is this needed for 1.0.4? Why not delay until 1.1.0 and sync up with jexl?

[codecov]

Codecov Report

Merging #1666 (d7e7cee) into master (e9d049c) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1666      +/-   ##
==========================================
- Coverage   58.74%   58.73%   -0.01%     
==========================================
  Files         456      456              
  Lines       21156    21156              
  Branches     5009     5009              
==========================================
- Hits        12428    12427       -1     
- Misses       8418     8419       +1     
  Partials      310      310              

Impacted Files	Coverage Δ
...earDisplay/models/baseLinearDisplayConfigSchema.ts	100.00% <ø> (ø)
...genome-view/src/LinearBasicDisplay/configSchema.ts	100.00% <ø> (ø)
...BaseLinearDisplay/components/BaseLinearDisplay.tsx	85.10% <0.00%> (-2.13%)	⬇️
packages/core/util/index.ts	81.81% <0.00%> (ø)

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[cmdcolin]

I guess on second thoughts let's just go for it :)