[NTPShortcuts] Show readonly dialog for non-editable shortcuts

Previously, when an enterprise shortcut was not editable or removable,
the more actions menu was hidden but the user would see a tooltip
describing the disablement. After UX review, that caused confusion with
a clickable button that did not perform any action. Making the button
disabled was not ideal as the tooltip would disappear and only show the
tile's title instead.

This change updates the UX to
 - Enable the three dot menu for all enterprise shortcuts cases
 - Rename "Edit shortcut" button to "Details" if the shortcut cannot
 be edited due to admin policy
 - Show a readonly dialog if the user selects the "Details" button
 - Adds a policy subtitle in the dialog to align with the search
 engines edit dialog

Before: https://screenshot.googleplex.com/5o734fRvL8o72ba
After: https://screencast.googleplex.com/cast/NDgwNTEzMzQ4NDQyNTIxNnw2NWRmZTlhNi1hYw

Bug: b:443157195
Change-Id: I974445ebfedd021ec394f184aaaa076a0a2874f1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6917356
Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Commit-Queue: Alex Chen <alexwchen@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1511903}
10 files changed
tree: 18e0f66d7e6d0680081817603e798070080428a1
  1. .gemini/
  2. .github/
  3. agents/
  4. android_webview/
  5. apps/
  6. ash/
  7. base/
  8. build/
  9. build_overrides/
  10. buildtools/
  11. cc/
  12. chrome/
  13. chromecast/
  14. chromeos/
  15. codelabs/
  16. components/
  17. content/
  18. crypto/
  19. dbus/
  20. device/
  21. docs/
  22. extensions/
  23. fuchsia_web/
  24. gin/
  25. google_apis/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  31. media/
  32. mojo/
  33. net/
  34. pdf/
  35. printing/
  36. remoting/
  37. rlz/
  38. sandbox/
  39. services/
  40. skia/
  41. sql/
  42. storage/
  43. styleguide/
  44. testing/
  45. third_party/
  46. tools/
  47. ui/
  48. url/
  49. webkit/
  50. .clang-format
  51. .clang-tidy
  52. .clangd
  53. .cursorignore
  54. .geminiignore
  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. CPPLINT.cfg
  71. CRYPTO_OWNERS
  72. DEPS
  73. DIR_METADATA
  74. LICENSE
  75. LICENSE.chromium_os
  76. OWNERS
  77. PRESUBMIT.py
  78. PRESUBMIT_test.py
  79. PRESUBMIT_test_mocks.py
  80. README.md
  81. SECURITY_OWNERS
  82. WATCHLISTS
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