fix TraceDiff graph pan and zoom issue

[anshgoyalevil]

Which problem is this PR solving?

• Fix pan and zoom issue on TraceDiff graph from [Bug]: asm.js type error in latest 1.61.0 version jaeger#5992

Description of the changes

• This PR fixes the PAN and ZOOM functionality, which was caused by a minor CSS issue on the graph's parent that had relative position carried down the DOM to graph.

How was this change tested?

• viewed the changes in browser by running jaeger-ui in dev, and jaeger monitor docker compose example.

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

[anshgoyalevil]

@yurishkuro It was a trivial fix so I think we can get it solved without waiting for a mentee to actually dig in

[yurishkuro]

Thanks!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.63%. Comparing base (c9ccd8b) to head (faaa39a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2566   +/-   ##
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  Coverage   96.63%   96.63%           
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  Files         255      255           
  Lines        7728     7728           
  Branches     2015     2002   -13     
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  Hits         7468     7468           
  Misses        260      260           

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