[Admin] Improve display of unsent reports on summary page

[davea]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.62%. Comparing base (ccd2736) to head (5f130db).
Report is 550 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5142       +/-   ##
===========================================
+ Coverage   53.13%   84.62%   +31.48%     
===========================================
  Files         323      422       +99     
  Lines       23962    39618    +15656     
  Branches     4512     6944     +2432     
===========================================
+ Hits        12733    33525    +20792     
+ Misses       9971     4372     -5599     
- Partials     1258     1721      +463     

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