[iOS] Child Column views can overflow the bounds of their parents

[dnagler]

While implementing the Activity receipt view on iOS, I noticed some unexpected behavior with the Column view. The UI is defined as follows:

Column(
  width = Constraint.Fill,
  height = Constraint.Fill,
  horizontalAlignment = CrossAxisAlignment.Center,
) {
  Column(
    modifier = Modifier,
    width = Constraint.Fill,
    horizontalAlignment = CrossAxisAlignment.Center,
  ) {
    // Header view
  }
  Column(
    modifier = Modifier.grow(1.0),
    horizontalAlignment = CrossAxisAlignment.Center,
    width = Constraint.Fill,
    height = Constraint.Fill,
    verticalAlignment = MainAxisAlignment.Center,
    margin = Margin(bottom = 24.dp),
  ) {
    // Body view
  }
}

In Xcode's view debugger, I'm seeing the following:

Note how the body view extends far below the bounds of its parent. This seems like a bug to me, or unexpected behavior at the very least.

[dnagler]

Added an example in PR #1420

[dnagler]

@colinrtwhite I think we can close this, now that #1724 has landed (thanks again for taking a look!)