Fix breakpoint split view showing too many connections for paired end ends

[cmdcolin]

The breakpoint split view when plotting the paired read connections across chromosomes uses the fact that the flag is NOT "read mapped in proper pair" https://broadinstitute.github.io/picard/explain-flags.html?flag=100

But it was using the old flag helpers which were removed. Instead we check bitwise ops on the flag

[codecov]

Codecov Report

Merging #1534 (2032c4c) into master (20b12f3) will decrease coverage by 0.00%.
The diff coverage is 30.00%.

@@            Coverage Diff             @@
##           master    #1534      +/-   ##
==========================================
- Coverage   59.49%   59.48%   -0.01%     
==========================================
  Files         435      435              
  Lines       19535    19538       +3     
  Branches     4555     4552       -3     
==========================================
  Hits        11622    11622              
- Misses       7618     7621       +3     
  Partials      295      295              

Impacted Files	Coverage Δ
plugins/breakpoint-split-view/src/model.ts	43.51% <30.00%> (+0.54%)	⬆️
packages/core/util/analytics.ts	75.60% <0.00%> (-2.44%)	⬇️
...ins/wiggle/src/LinearWiggleDisplay/models/model.ts	81.98% <0.00%> (-0.91%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 20b12f3...b0886b4. Read the comment docs.