Bring back interactive keyboard dismissal on compose screen

Tusker/Screens/Compose/ComposeView.swift

@@ -89,7 +89,7 @@ struct ComposeView: View {
                 ScrollView(.vertical) {
                     mainStack(outerMinY: outer.frame(in: .global).minY)
                 }
-                .scrollDismissesKeyboard(.interactively)
+                .scrollDismissesKeyboardInteractivelyIfAvailable()
             }
             
             if let poster = poster {
@@ -251,6 +251,18 @@ struct ComposeView: View {
     }
 }
 
+private extension View {
+    @available(iOS, obsoleted: 16.0)
+    @ViewBuilder
+    func scrollDismissesKeyboardInteractivelyIfAvailable() -> some View {
+        if #available(iOS 16.0, *) {
+            self.scrollDismissesKeyboard(.interactively)
+        } else {
+            self
+        }
+    }
+}
+
 //struct ComposeView_Previews: PreviewProvider {
 //    static var previews: some View {
 //        ComposeView()