Add Lao Grade 1 braille table

[michaelDCurran]

Link to issue number:

None.

Summary of the issue:

There have been requests for NVDA to support the Lao Grade 1 braille table. Liblouis does contain a braille table for Lao Grade1, but it is not listed for use in NVDA.

Description of user facing changes

the Lao Grade 1 braille table is now available in NVDA.

Description of development approach

Registered the Lao Grade 1 (lo-g1.utb) braille table with NvDA.

Testing strategy:

• Verified that Lao Grade 1 shows up in the braille table selection list in NVDA settings.
• Verified that Lao Grade 1 loads when chosen and Braille is written to the display.

Known issues with pull request:

None known.

Code Review Checklist:

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

[AppVeyorBot]

• Build (for testing PR): https://ci.appveyor.com/api/buildjobs/a6xscsncoib4vub5/artifacts/output/nvda_snapshot_pr16470-31691,d80e1810.exe
• FAIL: System tests (tags: installer NVDA). See test results for more information.
• PASS: Unit tests.
• CI timing (mins): INIT 0.0, INSTALL_START 1.1, INSTALL_END 1.0, BUILD_START 0.0, BUILD_END 29.6, TESTSETUP_START 0.0, TESTSETUP_END 0.4, TEST_START 0.0, TEST_END 2.4, FINISH_END 0.2
• PASS: Lint check.
• PASS: Translation comments check.

See test results for failed build of commit d80e1810a9