adding missing const

frontend/lib/modules/current_trip_panel.dart

@@ -45,7 +45,7 @@ class _CurrentTripPanelState extends State<CurrentTripPanel> {
                 // this way the greeter will be centered when the panel is collapsed
                 // note that we need to account for the padding above
                 height: MediaQuery.of(context).size.height * TRIP_PANEL_MIN_HEIGHT - 10,
-                child: Center(child: 
+                child: Center(child:
                   AutoSizeText(
                     maxLines: 1,
                     'Error',
@@ -81,7 +81,7 @@ class _CurrentTripPanelState extends State<CurrentTripPanel> {
               ),
 
               Padding(
-                padding: EdgeInsets.all(10),
+                padding: const EdgeInsets.all(10),
                 child: Container(
                   decoration: BoxDecoration(
                     color: Colors.grey[100],
@@ -94,9 +94,6 @@ class _CurrentTripPanelState extends State<CurrentTripPanel> {
                         ExpansionTile(
                           leading: const Icon(Icons.location_on),
                           title: const Text('Visited Landmarks (tap to expand)'),
-                          children: [
-                            ...landmarksList(widget.trip, selector: (Landmark landmark) => landmark.visited),
-                          ],
                           visualDensity: VisualDensity.compact,
                           collapsedShape: RoundedRectangleBorder(
                             borderRadius: BorderRadius.circular(10),
@@ -104,12 +101,15 @@ class _CurrentTripPanelState extends State<CurrentTripPanel> {
                           shape: RoundedRectangleBorder(
                             borderRadius: BorderRadius.circular(10),
                           ),
+                          children: [
+                            ...landmarksList(widget.trip, selector: (Landmark landmark) => landmark.visited),
+                          ],
                         ),
                     ],
                   ),
                 ),
               ),
-              
+
 
               const Padding(padding: EdgeInsets.only(top: 10)),