Description error fix

Description matched another message.

_locales/en/messages.json

@@ -293,7 +293,7 @@
     },
     "optionsAddRuleTooltip": {
         "message": "Add the rule",
-        "description": "Popup text 'Delete the rule' in the options page"
+        "description": "Popup text 'Add the rule' in the options page"
     },
     "optionsValidateChangesTooltip": {
         "message": "Validate changes",
@@ -443,4 +443,4 @@
         "message": "Enter a new name for the selected profile",
         "description": "Popup text 'Enter a new name for the selected profile' in the options page"
     }
-}
+}