fix for iOS

lib/models/native_model.dart

@@ -124,6 +124,7 @@ class PlatformFFI {
   }
 
   static invokeMethod(String method,[ dynamic arguments ]) async {
+    if (!isAndroid) return Future<bool>(() => false);
     return await toAndroidChannel.invokeMethod(method,arguments);
   }
 }

lib/pages/chat_page.dart

@@ -244,7 +244,9 @@ class _ChatWindowOverlayState extends State<ChatWindowOverlay> {
         left: _o.dx,
         width: widget.windowWidth,
         height: widget.windowHeight,
-        child: Scaffold(
+        child: isIOS
+            ? chatPage
+            : Scaffold(
                 resizeToAvoidBottomInset: false,
                 appBar: CustomAppBar(
                   onPanUpdate: (d) => changeOffset(d.delta),

lib/pages/connection_page.dart

@@ -20,7 +20,7 @@ class ConnectionPage extends StatefulWidget implements PageShape {
   final title = translate("Connection");
 
   @override
-  final appBarActions = isWeb ? <Widget>[WebMenu()] : <Widget>[];
+  final appBarActions = !isAndroid ? <Widget>[WebMenu()] : <Widget>[];
 
   @override
   final scrollController = ScrollController();