MetaDraw: Biopolymer Coverage now support multiple databases

[nbollis]

Previously, biopolymer coverage tab used a single database. Now it will use many databases. UI display is similar to multiple psm or spectra files on the main metadraw window

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.73%. Comparing base (4a3ab6f) to head (bf95ad3).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2615   +/-   ##
=======================================
  Coverage   94.72%   94.73%           
=======================================
  Files         187      187           
  Lines       19658    19665    +7     
  Branches     3636     3641    +5     
=======================================
+ Hits        18621    18629    +8     
  Misses        566      566           
+ Partials      471      470    -1     

Flag	Coverage Δ
unittests	94.73% <100.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
...raw/BioPolymerCoverage/BioPolymerGroupViewModel.cs	100.00% <100.00%> (ø)
...aDraw/BioPolymerCoverage/BioPolymerTabViewModel.cs	97.20% <100.00%> (+0.06%)	⬆️
...rpheus/GuiFunctions/MetaDraw/MetaDrawDataLoader.cs	91.19% <100.00%> (+0.34%)	⬆️

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