Fixed EuiSuperDatePicker "End date" popover shows wrong relative time

[ashikmeerankutty]

Summary

Possible Fix for: #3131

The "End date" popover shows the same relative time as the "Start date" popover. This can be solved by converting the value on relative tab to absolute string using toAbsoluteString function

Before:

After:

Checklist

• Check against all themes for compatibility in both light and dark modes
• Checked in mobile
• Checked in IE11 and Firefox
  - [ ] Props have proper autodocs
  - [ ] Added documentation examples
  - [ ] Added or updated jest tests
• Checked for breaking changes and labeled appropriately
• Checked for accessibility including keyboard-only and screenreader modes
• A changelog entry exists and is marked appropriately

[kibanamachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[cchaos]

Jenkins test this

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_3132/

[thompsongl]

Thanks! This looks good.

I think there would be ways to prevent from converting to absolute format each time, but the later-used parseRelativeParts function largely handles the complexity and prevents some very specific branches from appearing earlier.