[frontend] Change some wordings

[RomuDeuxfois]

• Filters “Kill chain phases” should be singular → “Kill chain phase”
• Wording Bug: Button not correct : change it for “Replay all tests” instead of “replay all the tests”

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 31.32%. Comparing base (250b2f8) to head (fa86044).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1432   +/-   ##
=========================================
  Coverage     31.32%   31.32%           
  Complexity     1400     1400           
=========================================
  Files           526      526           
  Lines         13693    13693           
  Branches        814      814           
=========================================
  Hits           4289     4289           
  Misses         9204     9204           
  Partials        200      200           

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