GUI: Fix separators when opening file to editor.

Ticket: #2916 (Wrong slashes in file path passed to the Windows-text editors)

gui/resultstree.cpp

@@ -703,6 +703,8 @@ void ResultsTree::StartApplication(QStandardItem *target, int application)
 
         //Replace (file) with filename
         QString file = data["file"].toString();
+        file = QDir::toNativeSeparators(file);
+        qDebug() << "Opening file: " << file;
 
         QFileInfo info(file);
         if (!info.exists())