[A11y] 1.Error analysis tree node text alignment 2. Add ariaLabel for new cohort panel 3. Model overview chart fix

[RubyZ10]

Signed-off-by: Ruby Zhu zhenzhu@microsoft.com

Description

1. Fix error analysis tree node text alignment
   Before fix
   

After fix

2. Add aria-label for New Cohort panel

3. For model overview probability distribution and metrics visualizations, move choose cohorts button above charts.
   Fix choose metric button reflow issue, it got truncated in small screen
   Before fix
   the choose cohorts button is on the left
   
   
   the choose cohorts button is above the chart
   

After fix
the choose cohorts button is above chart for all three scenarios

Before fix - 320*256 resolution
The choose cohorts button is gone and choose label button is not fully visible
Same issue for metrics visualizations

After fix

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 #1719 (ddabf44) into main (40108ea) will decrease coverage by 3.55%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1719      +/-   ##
==========================================
- Coverage   89.00%   85.45%   -3.56%     
==========================================
  Files         105       58      -47     
  Lines        5577     3032    -2545     
==========================================
- Hits         4964     2591    -2373     
+ Misses        613      441     -172     

Flag	Coverage Δ
unittests	85.45% <ø> (-3.56%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ponsibleai/databalanceanalysis/balance_measures.py
...sponsibleai/responsibleai/managers/base_manager.py
...sibleai/responsibleai/rai_insights/rai_insights.py
.../databalanceanalysis/aggregate_balance_measures.py
...ponsibleai/responsibleai/rai_insights/constants.py
...leai/responsibleai/modelanalysis/model_analysis.py
...tabalanceanalysis/distribution_balance_measures.py
...ai/responsibleai/_tools/error_analysis/__init__.py
...ai/responsibleai/rai_insights/rai_base_insights.py
...ai/responsibleai/_tools/counterfactual/__init__.py
... and 37 more

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[github-actions]

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[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/zhenzhu/accessibility/dashboard/index.html