Various Flo fixes. Workaround for JointJS bug. Flo 0.8.4

[BoykoAlex]

Fixes #887
Hopefully fixes #896
Updates Flo to 0.8.4

[codecov-io]

Codecov Report

Merging #891 into master will decrease coverage by <.01%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #891      +/-   ##
==========================================
- Coverage   65.25%   65.24%   -0.01%     
==========================================
  Files         257      257              
  Lines       10622    10622              
  Branches     1413     1414       +1     
==========================================
- Hits         6931     6930       -1     
  Misses       3318     3318              
- Partials      373      374       +1

Impacted Files	Coverage Δ
ui/src/app/tasks/components/flo/support/layout.ts	75% <100%> (ø)	⬆️
ui/src/app/shared/flo/support/shared-shapes.ts	48.64% <75%> (-2.71%)	⬇️

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