add display_name field to models and update related forms and templates

gatekeeper/migrations/0011_authmethod_display_name_gatekeepergroup_display_name.py

@@ -0,0 +1,21 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gatekeeper', '0010_alter_gatekeeperuser_email'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='authmethod',
+            name='display_name',
+            field=models.CharField(blank=True, max_length=128),
+        ),
+        migrations.AddField(
+            model_name='gatekeepergroup',
+            name='display_name',
+            field=models.CharField(blank=True, max_length=128),
+        ),
+    ]