Improve dropped functions UI

[mstange]

Production | Deploy preview

Fixes #4678.

┆Issue is synchronized with this Jira Task

[codecov[bot]]

Codecov Report

Patch coverage: 69.67% and project coverage change: -0.13 :warning:

Comparison is base (eac238a) 88.33% compared to head (f3001f2) 88.21%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4682      +/-   ##
==========================================
- Coverage   88.33%   88.21%   -0.13%     
==========================================
  Files         299      301       +2     
  Lines       26709    26829     +120     
  Branches     7206     7231      +25     
==========================================
+ Hits        23594    23667      +73     
- Misses       2902     2944      +42     
- Partials      213      218       +5     

Impacted Files	Coverage Δ
src/components/app/MenuButtons/Permalink.js	81.81% <ø> (ø)
src/components/app/MenuButtons/index.js	88.17% <ø> (ø)
src/components/shared/StackSettings.js	86.36% <ø> (ø)
src/profile-logic/profile-data.js	93.51% <0.00%> (-0.30%)	:arrow_down:
src/utils/flow.js	84.28% <ø> (-0.23%)	:arrow_down:
src/components/shared/DroppedFunctionsPanel.js	5.88% <5.88%> (ø)
src/selectors/per-thread/thread.js	91.94% <50.00%> (-3.06%)	:arrow_down:
src/actions/profile-view.js	90.13% <57.14%> (-0.37%)	:arrow_down:
src/reducers/url-state.js	95.59% <61.29%> (-2.66%)	:arrow_down:
src/app-logic/url-handling.js	86.34% <77.27%> (-0.40%)	:arrow_down:
... and 7 more

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[mstange]

This is ready for review now. It's not super polished visually, but I think it's a vast improvement over what we have today. Also, I really want the dropFunctions action for the report generator.

It's also missing some tests.