Fix LayoutExplorer cycle by @LongCatIsLooong in https://github.com/flutter/flutter/pull/115526

Tiny code cleanup: remove unnecessary comparisons by @fzyzcjy in https://github.com/flutter/flutter/pull/114488

Menu bar accelerators by @gspencergoog in https://github.com/flutter/flutter/pull/114852

Ignore NullThrownError deprecation by @mit-mit in https://github.com/flutter/flutter/pull/116135

Disable backspace/delete handling on iOS & macOS by @LongCatIsLooong in https://github.com/flutter/flutter/pull/115900

Update SnackBar to support Material 3 by @esouthren in https://github.com/flutter/flutter/pull/115750