Fix/delete training records

[ssrome]

Work done

• Add function in add-edit-training to route to delete record as previous way caused issues
• Update karma.conf to run ChromeHeadlessNoSandbox

Tests

Does this PR include tests for the changes introduced?

• Yes
• No, I found it difficult to test
• No, they are not required for this change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ae3e931) 52.17% compared to head (534511b) 52.18%.

Additional details and impacted files

@@           Coverage Diff           @@
##             live    #6015   +/-   ##
=======================================
  Coverage   52.17%   52.18%           
=======================================
  Files        1140     1140           
  Lines       37428    37431    +3     
  Branches     4566     4567    +1     
=======================================
+ Hits        19529    19532    +3     
  Misses      13978    13978           
  Partials     3921     3921           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[magicmilo]

Good stuff