Allow Voice Access to find clickable cards

[peterychang]

Why are these changes needed?

Fixes accessibility issue (34)

Related issue number

#5634

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://github.com/microsoft/autogen/blob/main/CONTRIBUTING.md to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.60%. Comparing base (97dbc5c) to head (83df100).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5857   +/-   ##
=======================================
  Coverage   75.60%   75.60%           
=======================================
  Files         189      189           
  Lines       12734    12734           
=======================================
+ Hits         9627     9628    +1     
+ Misses       3107     3106    -1     

Flag	Coverage Δ
unittests	75.60% <ø> (+<0.01%)	⬆️

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