Move tracediff header chevron icon

[Parship999]

Which problem is this PR solving?

• Related to Enhance TraceDiff UI components #2806

Description of the changes

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: npm run lint and npm run test

[graphite-app]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.39%. Comparing base (3ad664b) to head (cfc0471).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2845   +/-   ##
=======================================
  Coverage   97.39%   97.39%           
=======================================
  Files         256      256           
  Lines        7975     7975           
  Branches     2062     2084   +22     
=======================================
  Hits         7767     7767           
  Misses        208      208           

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