fixes #483: Keyboard covers input text box when editing message

packages/stream_chat_flutter/lib/src/message_actions_modal.dart

@@ -625,7 +625,9 @@ class _MessageActionsModalState extends State<MessageActionsModal> {
           topRight: Radius.circular(16),
         ),
       ),
-      builder: (context) => StreamChannel(
+      builder: (context) => Padding(
+        padding: MediaQuery.of(context).viewInsets,
+        child: StreamChannel(
           channel: channel,
           child: Flex(
             direction: Axis.vertical,
@@ -669,6 +671,7 @@ class _MessageActionsModalState extends State<MessageActionsModal> {
             ],
           ),
         ),
+      ),
     );
   }