81647 Add slider adaptive cupertino thumb color (framework, f: material design, cla: yes, f: cupertino, waiting for tree to go green)

81686 Add “onTap” callback to PopupMenuItem (framework, f: material design, cla: yes)

81699 Fixed some trivial formatting issues in test/material/popup_menu_test.dart (framework, f: material design, cla: yes)

81706 Integrate MaterialBanner with the ScaffoldMessenger API (severe: new feature, framework, a: animation, f: material design, a: fidelity, cla: yes, d: api docs, d: examples, a: quality, waiting for tree to go green, documentation)

81813 ExpansionPanelList elevation as double (framework, f: material design, cla: yes, waiting for tree to go green)