StackNavigationViewStyle avoids split view on iPad

Previously when the sheet was created on iPad, the content would be rendered as the master view of a split view, with no detail view. Often this would lead to no content being displayed, and a confusing back button added.

StackNavigationViewStyle makes no change to the iPhone design but makes this sheet suitable for form/page sheet presentation on iPad, showing the content immediately.

Author: joshheald

WooCommerce/Classes/ViewRelated/ReusableViews/SwiftUI Components/WooNavigationSheet.swift

@@ -34,5 +34,6 @@ struct WooNavigationSheet<Content: View>: View {
                 }
                 .wooNavigationBarStyle()
         }
+        .navigationViewStyle(StackNavigationViewStyle())
     }
 }