time step + step delete + sorting improvement

cookbook/migrations/0070_auto_20200701_2007.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.0.7 on 2020-07-01 18:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0069_auto_20200629_2134'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='step',
+            name='time',
+            field=models.IntegerField(blank=True, default=0),
+        ),
+        migrations.AlterField(
+            model_name='step',
+            name='kind',
+            field=models.CharField(choices=[('TEXT', 'Text'), ('TIME', 'Time')], default='TEXT', max_length=16),
+        ),
+    ]