Minor admin improvements

dcc/roster/migrations/0002_alter_rollingstock_address.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.0.2 on 2022-04-01 20:32
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('roster', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='rollingstock',
+            name='address',
+            field=models.SmallIntegerField(blank=True, default=None, null=True),
+        ),
+    ]