Removed rules keep re-appear

[silver886]

This is an UI error makes already deleted rules appear in the Defaults rule list.
Restart the application can resolve this issue.

Reproduce steps:

1. Create a rule in Defaults tab.
2. Delete the rule by clicking the X on the right.
3. Create another rule.

---

OS version: 22631.3447

[mortenn]

Thanks for the report, I've patched the bug!