62062 makes PopupMenuitem merge the semantics of its child (cla: yes, f: material design, framework, waiting for tree to go green)

62071 Make it an error to break doc macros (and fix existing broken macros) (cla: yes, f: material design, framework, waiting for tree to go green)

62072 SelectableText handles after Select All (cla: yes, f: material design, framework, waiting for tree to go green)

62074 Fix RenderFlex crossSize for baseline alignment (P3, a: layout, cla: yes, framework, waiting for tree to go green)

62075 Update the About dialog to use the new button API. (cla: yes, f: material design, framework, waiting for tree to go green)

62083 Update the documentation of GlobalKey to explain why it is expensive (cla: yes, d: api docs, documentation, framework, waiting for tree to go green)