70726 Remove the nullOk parameter from Navigator.of and add Navigator.maybeOf (cla: yes, f: cupertino, f: material design, framework, team)

70730 Improve performance of Widget Tests (a: tests, cla: yes, framework, waiting for tree to go green)

70773 Use adaptive more icon for popup_menu (cla: yes, f: material design, framework, waiting for tree to go green)

70787 Restart EditableText cursor timer when it moves (cla: yes, framework, waiting for tree to go green)

70809 Fix type cast null safety in MethodChannel._invokeMethod (cla: yes, framework, waiting for tree to go green)

70819 Add RichText debugFillProperties TestCase (cla: yes, framework, waiting for tree to go green)