From a3c120bb7d2ca91a75f0d5125942f64dfad7890f Mon Sep 17 00:00:00 2001
From: Stephen Blott
Date: Sun, 29 Oct 2017 10:18:33 +0000
Subject: Fix restore for exclusion rules.

In the case of exclusion rules, we first have to remove existing rules;
otherwise, the restored rules are *appended* to the existing rules.
---
 pages/options.coffee | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pages/options.coffee b/pages/options.coffee
index 65838203..9df1c175 100644
--- a/pages/options.coffee
+++ b/pages/options.coffee
@@ -100,8 +100,10 @@ class ExclusionRulesOption extends Option
       element
 
   populateElement: (rules) ->
-    for rule in rules
-      @appendRule rule
+    # For the case of restoring a backup, we first have to remove existing rules.
+    exclusionRules = $ "exclusionRules"
+    exclusionRules.deleteRow 1 while exclusionRules.rows[1]
+    @appendRule rule for rule in rules
 
   # Append a row for a new rule.  Return the newly-added element.
   appendRule: (rule) ->
-- 
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