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replace simple empty Container with w & h with SizedBox (#54394)

* replace simple Container(w & h) with SizedBox

* address review comments

* address review comments
A
Alexandre Ardhuin committed
7ceed9730292ea74528538c9654236d9f227ef44
Parent: b0610be
Committed by GitHub <noreply@github.com> on 4/10/2020, 8:32:40 PM