Fix app bar

lib/views/chat_list.dart

@@ -299,7 +299,6 @@ class _ChatListState extends State<ChatList> {
                         ? Text(L10n.of(context).share)
                         : Padding(
                             padding: EdgeInsets.all(8),
-                            child: Expanded(
                             child: TextField(
                               autocorrect: false,
                               controller: searchController,
@@ -311,7 +310,6 @@ class _ChatListState extends State<ChatList> {
                             ),
                           ),
                   ),
-                  ),
                   floatingActionButton:
                       (AdaptivePageLayout.columnMode(context) ||
                               selectMode == SelectMode.share)