Fixed up some stupid recursion on the Tree model template

InvenTree/part/migrations/0008_auto_20190618_0042.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2.2 on 2019-06-17 14:42
+
+import InvenTree.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0007_auto_20190602_1944'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='partcategory',
+            name='name',
+            field=models.CharField(max_length=100, unique=True, validators=[InvenTree.validators.validate_tree_name]),
+        ),
+    ]