iOS: Use interactive keyboard dismissal

Gemini-iOS/ContentView.swift

@@ -34,6 +34,7 @@ struct ContentView: View {
             
             bottomBar
         }
+        .onAppear(perform: tweakAppearance)
         .onReceive(navigator.$currentURL, perform: { (new) in
             urlFieldContents = new.absoluteString
         })
@@ -104,6 +105,10 @@ struct ContentView: View {
         .padding(.top, 4)
     }
     
+    private func tweakAppearance() {
+        UIScrollView.appearance().keyboardDismissMode = .interactive
+    }
+    
     private func commitURL() {
         guard let url = URL(string: urlFieldContents) else { return }
         navigator.changeURL(url)