Upgrade from MUI4 to MUI5 [breaking changes]

[cbeer]

Style and theme

• Migrate theme styleOverrides to Emotion
• Remove gutters
• Look at theme palette colors
• Restructure component definitions

Components

• Upgrade popper from v1 to v2

Notable MUI 4 overrides to validate:

• Refine tooltip locations to minimize covering other controls #2374
• Remove the "water droplet" animations #2306
• Consistency of hover/focus/selected indicators #2479
• Update theme settings and assignments related to secondary color #2563
• Typography classes & styles #2093
• Ensure all link colors are consistent (and ideally configurable) #2894

[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (04c5b67) 92.49% compared to head (cc7330d) 92.53%.
Report is 11 commits behind head on master.

Files	Patch %	Lines
src/components/ScrollIndicatedDialogContent.js	50.00%	4 Missing ⚠️
src/components/CollectionDialog.js	50.00%	3 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3648      +/-   ##
==========================================
+ Coverage   92.49%   92.53%   +0.03%     
==========================================
  Files         201      203       +2     
  Lines        3465     3576     +111     
==========================================
+ Hits         3205     3309     +104     
- Misses        260      267       +7     

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