customization: Fix accessibility in customize mouse button subpage

Update key combination dialog, Rename icon and dropdown list chromevox
accessibility. Add an alert to read the help title and description. Fix
focus when close the renaming dialog.

Screenshots:
http://screen/i4N7DARAVkjFNe7
http://screen/3bCqvk4NvGJCv8B
http://screen/86rV9uHMFvkxY77
http://screen/48eaTfpR6Ks3zNA

Bug: b:241965717
Test: Test in VM
Change-Id: Iaafc6e1db6b2952a6e0f3e81386862173a24267f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5280617
Reviewed-by: David Padlipsky <dpad@google.com>
Commit-Queue: Danny Wang <wangdanny@google.com>
Reviewed-by: Wes Okuhara <wesokuhara@google.com>
Cr-Commit-Position: refs/heads/main@{#1260623}
12 files changed
tree: 0c2b417f2cfe4bb399a8a1cb316443717d33fe2b
  1. android_webview/
  2. apps/
  3. ash/
  4. base/
  5. build/
  6. build_overrides/
  7. buildtools/
  8. cc/
  9. chrome/
  10. chromecast/
  11. chromeos/
  12. codelabs/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. native_client_sdk/
  33. net/
  34. pdf/
  35. ppapi/
  36. printing/
  37. remoting/
  38. rlz/
  39. sandbox/
  40. services/
  41. skia/
  42. sql/
  43. storage/
  44. styleguide/
  45. testing/
  46. third_party/
  47. tools/
  48. ui/
  49. url/
  50. webkit/
  51. .clang-format
  52. .clang-tidy
  53. .clangd
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitallowed
  57. .gitattributes
  58. .gitignore
  59. .gitmodules
  60. .gn
  61. .mailmap
  62. .rustfmt.toml
  63. .vpython3
  64. .yapfignore
  65. ATL_OWNERS
  66. AUTHORS
  67. BUILD.gn
  68. CODE_OF_CONDUCT.md
  69. codereview.settings
  70. DEPS
  71. DIR_METADATA
  72. LICENSE
  73. LICENSE.chromium_os
  74. OWNERS
  75. PRESUBMIT.py
  76. PRESUBMIT_test.py
  77. PRESUBMIT_test_mocks.py
  78. README.md
  79. WATCHLISTS
README.md

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