CustomScopeBar: Fix search bar placement

iOS 16 has a new search bar placement value which applies the searchbar
in the top-right corner with iPads. Searchable does this automatically,
but SwiftUIx's modifier needs this fix.

Signed-off-by: kingbri <bdashore3@proton.me>

Ferrite/Views/CommonViews/Modifiers/CustomScopeBar.swift

@@ -51,6 +51,10 @@ struct CustomScopeBarModifier<V: View>: ViewModifier {
                     self.hostingController = hostingController
                 }
                 .introspectNavigationController { navigationController in
+                    if #available(iOS 16, *) {
+                        navigationController.viewControllers.first?.navigationItem.preferredSearchBarPlacement = .stacked
+                    }
+
                     navigationController.navigationBar.prefersLargeTitles = true
                     navigationController.navigationBar.sizeToFit()
                 }