7 admin super user

[dupreesi]

• relates AS AN administrator I NEED TO grant and remove super-user privileges to other users SO THAT they can also access the administration panel #7
• adds option to revoke super users
• adds super users to category 'my super users' for admin panel
• adds .eslintrc to client
• fixes BUG-ADMIN-PANEL: Clicking on user action always triggers delete popup #96

[codecov]

Codecov Report

Merging #97 into master will increase coverage by 0.08%.
The diff coverage is 32.07%.

@@            Coverage Diff             @@
##           master      #97      +/-   ##
==========================================
+ Coverage   22.65%   22.73%   +0.08%     
==========================================
  Files          86       87       +1     
  Lines         843      862      +19     
  Branches       82       82              
==========================================
+ Hits          191      196       +5     
- Misses        575      589      +14     
  Partials       77       77

Impacted Files	Coverage Δ
client/src/components/Admin/Users/AllUsers.js	0% <0%> (ø)	⬆️
client/src/components/Admin/Users/UsersColumns.js	0% <0%> (ø)	⬆️
server/database/queries/user/approveSuperUser.js	100% <100%> (ø)	⬆️
server/database/queries/user/index.js	100% <100%> (ø)	⬆️
server/database/queries/user/revokeSuperUser.js	100% <100%> (ø)

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