Clean up

lib/components/dialogs/new_group_dialog.dart

@@ -61,6 +61,7 @@ class _NewGroupDialogState extends State<NewGroupDialog> {
           TextField(
             controller: controller,
             autocorrect: false,
+            autofocus: true,
             textInputAction: TextInputAction.go,
             onSubmitted: (s) => submitAction(context),
             decoration: InputDecoration(

lib/utils/event_extension.dart

@@ -59,6 +59,12 @@ extension LocalizedBody on Event {
         if (newMembership != oldMembership) {
           if (oldMembership == "invite" && newMembership == "join") {
             text = "$targetName has accepted the invitation";
+          } else if (oldMembership == "invite" && newMembership == "leave") {
+            if (this.stateKey == this.senderId) {
+              text = "$targetName has rejected the invitation";
+            } else {
+              text = "$senderName has withdrawn the invitation for $targetName";
+            }
           } else if (oldMembership == "leave" && newMembership == "join") {
             text = "$targetName has joined the chat";
           } else if (oldMembership == "join" && newMembership == "ban") {