add unsent messages, fix hotkeys so they work with chrome

lib/chat/cubits/chat_component_cubit.dart

@@ -333,6 +333,7 @@ class ChatComponentCubit extends Cubit<ChatComponentState> {
             text: contentText.text,
             metadata: {
               kSeqId: message.seqId,
+              kSending: message.sendState == MessageSendState.sending,
               if (core.isOnlyEmoji(contentText.text)) 'isOnlyEmoji': true,
             });
         return (currentState, textMessage);