Replace NavigatorObserver._navigator with a static expando. by @stereotype441 in https://github.com/flutter/flutter/pull/109238

Implements browser context menu in selectable region by @chunhtai in https://github.com/flutter/flutter/pull/108909

Revert “disable new transition while toPictureSync is fixed” by @jonahwilliams in https://github.com/flutter/flutter/pull/109327

Move MagnifierBuilder, MagnifierOverlayInfoBearer from text_selection.dart by @tgucio in https://github.com/flutter/flutter/pull/108956

API documentation cleanup by @Hixie in https://github.com/flutter/flutter/pull/108500