fix

lib/pages/locations.dart

@@ -29,7 +29,8 @@ class _LocationsPageState extends State<LocationsPage> {
   TreeNode buildTree(BuildContext context, String locID) {
     return TreeNode(
         key: ValueKey(locID),
-        content: ListTile(
+        content: Expanded(
+          child: ListTile(
             title: Text(locations![locID]!.name),
             onTap: () {
               Navigator.of(context).push(MaterialPageRoute(
@@ -37,6 +38,7 @@ class _LocationsPageState extends State<LocationsPage> {
               ));
             },
           ),
+        ),
         children: locations!.keys.where((key2) {
           if (locations![key2]!.parent != null) {
             return locations![key2]!.parent! == locations![locID]!.id;