fix: return to sensors list after cancelling reposition only if you've arrived from there

lib/features/sensors/sensor_detail_sheet.dart

@@ -77,7 +77,10 @@ class _SensorDetailSheetState extends ConsumerState<SensorDetailSheet> {
 
   void _placeOnFloorPlan(BuildContext context, Sensor sensor) {
     final router = GoRouter.of(context);
+    final fromSensors =
+        router.routeInformationProvider.value.uri.path == '/sensors';
     ref.read(sensorPlacementProvider.notifier).state = sensor;
+    ref.read(sensorPlacementOriginSensorsProvider.notifier).state = fromSensors;
     Navigator.of(context, rootNavigator: true).pop();
     router.go('/floorplan');
   }