Cannot delete rule condition if label is empty

This is an EXTREMELY nitpicky bug report, so feel free to mark won't fix if you'd like.

Steps to reproduce:

1. Edit a rule with conditions
2. Edit one of the conditions
3. Make the "Label" field empty
4. Click the Delete button
5. Notice that you cannot delete the condition since the Label field is empty

Expected: Shouldn't matter if the label field is empty or not, since it's going to get deleted.