Fix UAC slider not announcing value with arrows

[tareh7z]

Link to issue number:

Fixes #9356.

Summary of the issue:

When navigating to the User Account Control settings dialog, NVDA would become silent when the slider value was changed using the arrow keys, so the current level was not announced.

Description of user facing changes:

NVDA now properly announces the current UAC slider value whenever it is adjusted with the arrow keys.

Description of developer facing changes:

None.

Description of development approach:

Added msctls_trackbar32 to the badUIAWindowClassNames tuple in UIAHandler/__init__.py.

Testing strategy:

Tested running from source.

Known issues with pull request:

None known.

Code Review Checklist:

• Documentation:
  • Change log entry
  • User Documentation
  • Developer / Technical Documentation
  • Context sensitive help for GUI changes
• Testing:
  • Unit tests
  • System (end to end) tests
  • Manual testing
• UX of all users considered:
  • Speech
  • Braille
  • Low Vision
  • Different web browsers
  • Localization in other languages / culture than English
• API is compatible with existing add-ons.
• Security precautions taken.

[seanbudd]

Thanks @tareh7z