Add Question.valid_file_portrait as well as crop editor for images

src/pretix/base/migrations/0182_question_valid_file_portrait.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.0.13 on 2021-04-19 09:39
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0181_team_can_checkin_orders'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='question',
+            name='valid_file_portrait',
+            field=models.BooleanField(default=False),
+        ),
+    ]