@HansMuller @gspencergoog

When making breaking changes of this nature please apply the breaking change policy:
https://flutter.io/design-principles/#handling-breaking-changes
In particular, sending the e-mail, waiting for feedback, and -- if the feedback is not negative -- updating the changelog when the PR lands. For this particular change, please include the diagrams in the changelog.

(And when reviewing PRs of this nature, please check that the process is being applied. :-) )

Going forward, we probably need to stop making this kind of breaking change (e.g. by padding the checkboxes so they maintain their size even as we change the size of the splash). We have too many customers now to be able to break people's layouts.

Thanks!