Fix transfer functoin, add display for numer of pending locos

lib/ui/app_shell.dart

@@ -195,6 +195,10 @@ class _MyAppState extends State<MyApp> {
                                 '',
                           )
                         : null;
+                final transferFromLabel = state.uri.queryParameters['transferFromLabel'] ??
+                    (state.extra is Map
+                        ? (state.extra as Map)['transferFromLabel']?.toString()
+                        : null);
                 final selectionMode =
                     (selectionParam != null && selectionParam.isNotEmpty) ||
                         replacementPendingLocoId != null ||
@@ -208,6 +212,7 @@ class _MyAppState extends State<MyApp> {
                   selectionMode: selectionMode,
                   selectionSingle: selectionSingle,
                   replacementPendingLocoId: replacementPendingLocoId,
+                  transferFromLabel: transferFromLabel,
                   transferFromLocoId: transferFromLocoId,
                 );
               },