Fix a bug where deleted filter was not removed from the list

(because now list widget's 'rows' property is of type object not array)

plugins/managesieve/Changelog

@@ -3,6 +3,7 @@
 - Fix bug where at least one additional address of vacation message was required (#1489345)
 - Fix so i;ascii-numeric comparator is not forced as default for :count and :value operators
 - Fix date/currentdate related form issues and comparators handling (#1489346)
+- Fix a bug where deleted filter was not removed from the list
 
 * version 7.0 [2013-09-09]
 -----------------------------------------------------------

plugins/managesieve/managesieve.js

@@ -161,7 +161,7 @@ rcube_webmail.prototype.managesieve_rowid = function(id)
 {
   var i, rows = this.filters_list.rows;
 
-  for (i=0; i<rows.length; i++)
+  for (i in rows)
     if (rows[i] != null && rows[i].uid == id)
       return i;
 };