[stable31] chore(SessionList): Migrate to NcButton and MDI icon

[backportbot]

Backport of PR #7184

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.71%. Comparing base (140f037) to head (4de245b).
Report is 3 commits behind head on stable31.

Additional details and impacted files

@@             Coverage Diff              @@
##           stable31    #7186      +/-   ##
============================================
+ Coverage     51.70%   58.71%   +7.01%     
============================================
  Files           287      286       -1     
  Lines         40810    36039    -4771     
  Branches        795      793       -2     
============================================
+ Hits          21100    21160      +60     
+ Misses        19588    14759    -4829     
+ Partials        122      120       -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.