Description

With a fix to RenderFlex we can remove intrinsics from one of the SliverFillRemainings.

Fix to RenderFlex: If a min extent is given, it should flex its children to at least fill the min extent even when the max extent is unbound. After all, it was asked to provide content for at least the min extent.

The RenderSliverFillRemainingAndOverscroll is still using intrinsics because it needs to know how much space the child would occupy if it doesn't reach into the overscroll. For that, we need to know the intrinsics of the child.

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