reset sharemetadata on removing file

oml/item/models.py

@@ -511,6 +511,8 @@ class Item(db.Model):
             self.users.remove(user)
         for l in self.lists.filter_by(user_id=user.id):
             l.items.remove(self)
+        if self.meta.get('sharemetadata'):
+            self.meta['sharemetadata'] = False
         if not self.users:
             self.delete()
         else: