64dfb8496c
This patch makes a number of changes: 1) buildDirtyComponents now prevents all calls to setState, not just those higher in the tree. This change is necessary for consistency with MixedViewport and HomogeneousViewport because those widgets already build subwidgets with that restriction. If the "normal" build didn't enforce that rule, then some widgets would break when put inside a mixed or homogeneous viewport. 2) We now notify global key listeners in a microtask after beginFrame. That means setState is legal in these callbacks and that we'll produce another frame if someone calls setState in such a callback.