[UrlCompleter] Don't show same urls multiple times

Closes #1096

CHANGELOG

@@ -29,6 +29,7 @@ Version 1.5.0
     * fixed: displaying a lot of RSS feeds in RSS widget in locationbar
     * fixed: enabling disabled rules in AdBlock now works everytime
     * fixed: parsing OpenSearch files with XML declaration
+    * fixed: don't show urls multiple times in url completer
 
 Version 1.4.4
     * released 1 September 2013

src/lib/navigation/completer/locationcompletermodel.cpp

@@ -213,6 +213,8 @@ QSqlQuery LocationCompleterModel::createQuery(const QString &searchString, const
         query.append(QString("AND (NOT %1.url=?) ").arg(table));
     }
 
+    query.append(QString("GROUP BY %1.url ").arg(table));
+
     if (!orderBy.isEmpty()) {
         query.append("ORDER BY " + orderBy);
     }