Added tooltip for Timestamp icon on Logs page

[eloyekunle]

This PR adds a tooltip to the 'Show Timestamp' button on the logs page.
Accessibility fix.

[codecov]

Codecov Report

Merging #3559 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3559   +/-   ##
=======================================
  Coverage   48.34%   48.34%           
=======================================
  Files         165      165           
  Lines        8027     8027           
  Branches       43       43           
=======================================
  Hits         3881     3881           
  Misses       3865     3865           
  Partials      281      281

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[maciaszczykm]

So quick! Thanks.

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: eloyekunle, maciaszczykm

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