touch ups from designer feedback to RAI dashboard for text data

[imatiach-msft]

Description

Minor touch-ups to the text dashboard based on designer feedback including:

1.) Moving legend text explaining positive and negative importance values to the top
2.) Moving the highlighted text back to the bottom of the view
3.) Changing slidebar to make words above the slidebar, and showing the value to the right of the slidebar

Checklist

• I have added screenshots above for all UI changes.
• I have added e2e tests for all UI changes.
• Documentation was updated if it was needed.

[codecov-commenter]

Codecov Report

Merging #1695 (5eb6451) into main (d1a6b50) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1695   +/-   ##
=======================================
  Coverage   88.90%   88.90%           
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  Files         105      105           
  Lines        5553     5553           
=======================================
  Hits         4937     4937           
  Misses        616      616           

Flag	Coverage Δ
unittests	88.90% <ø> (ø)

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[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/ilmat/text-ui-updates/dashboard/index.html

[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/ilmat/text-ui-updates/dashboard/index.html