Expose the FloatingPanel View

[rolson]

I think it would be nice to expose the floating panel view. I wanted to wrap the PopupView in a floating panel and call it a PopupPanel. I was able to do so, but it required a weird workaround with an empty Spacer view.

public struct PopupPanel: View {
    var popup: Popup?
    var isPresented: Binding<Bool>
    
    public var body: some View {
        Group {
            if let popup, isPresented.wrappedValue {
                // Here is the workaround, it works, but it's awkward.
                ZStack { Spacer() }
                    .floatingPanel(isPresented: isPresented) {
                        PopupView(popup: popup, isPresented: isPresented)
                            .showCloseButton(true)
                            .padding()
                }
            } else {
                EmptyView()
            }
        }
    }
}

If we exposed the FloatingPanel as a View, it would be much easier to do this. But right now it's private to the toolkit.

[dfeinzimer]

Note, the original motivation for exposing the floating panel as a modifier.