Improve styling of trace statistics selectors

[rubenvp8510]

Signed-off-by: Ruben Vargas [email protected]

Which problem is this PR solving?

• Fixes Improve styling of the new Trace Stats view #631

Short description of the changes

• Made some modification to CSS to match DDG selector styles, attached screenshots

[yurishkuro]

[prettier-lint] packages/jaeger-ui/src/components/TracePage/TraceStatistics/TraceStatisticsHeader.css
[prettier-lint] error Command failed with exit code 1.

[rubenvp8510]

Ups, I ran prettier and I forgot to update the PR

[codecov]

Codecov Report

Merging #639 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #639   +/-   ##
=======================================
  Coverage   93.59%   93.59%           
=======================================
  Files         227      227           
  Lines        5902     5902           
  Branches     1483     1483           
=======================================
  Hits         5524     5524           
  Misses        337      337           
  Partials       41       41           

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[yurishkuro]

Thanks!