Components: Avoid unguarded getRangeAt (Autocomplete)

[aduth]

Previously: #11457, #15576, #11209

Safari will throw errors when attempting to call Selection#getRangeAt when there are no ranges in the selection. This has resulted in block errors on multiple occasions in the past (#11209, #15576).

Tasks:

• Update all outstanding unguarded references to Selection#getRangeAt to be guarded.
  1. Fix Safari Linking: Check for selection range count before calling getRangeAt #15576 (comment)
• Consider an ESLint rule or other programmatic enforcement which might help avoid regressions in the future.
  • Proposed implementation at:
    • Fix Safari Linking: Check for selection range count before calling getRangeAt #15576 (comment)
    • https://astexplorer.net/#/gist/26984b64750ba301178a38680fbce17f/66c7af6eb40fa09446d81d33f4adf3697eb13b47