new tandoor theme added, minor ux fixes

cookbook/migrations/0124_alter_userpreference_theme.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.3 on 2021-05-30 15:53
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0123_invitelink_email'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='userpreference',
+            name='theme',
+            field=models.CharField(choices=[('BOOTSTRAP', 'Bootstrap'), ('DARKLY', 'Darkly'), ('FLATLY', 'Flatly'), ('SUPERHERO', 'Superhero'), ('TANDOOR', 'Tandoor')], default='FLATLY', max_length=128),
+        ),
+    ]