Stop using loadable with Buttons, Dialogs

[imnasnainaec]

Resolves #3803

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This change is 

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.81%. Comparing base (ff3185a) to head (2cf945e).
⚠️ Report is 37 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3940      +/-   ##
==========================================
- Coverage   73.87%   73.81%   -0.06%     
==========================================
  Files         294      292       -2     
  Lines       10662    10630      -32     
  Branches     1342     1342              
==========================================
- Hits         7877     7847      -30     
+ Misses       2398     2396       -2     
  Partials      387      387              

Flag	Coverage Δ
backend	85.49% <ø> (ø)
frontend	65.08% <ø> (-0.16%)	⬇️

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[jasonleenaylor]

@jasonleenaylor reviewed 68 of 68 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)