--- a/ui/certificatetablemodel.cpp	Tue Apr 15 09:44:54 2014 +0200
+++ b/ui/certificatetablemodel.cpp	Tue Apr 15 12:32:34 2014 +0200
@@ -20,6 +20,22 @@
     endInsertRows();
 }
 
+bool CertificateTabelModel::removeRows(int row, int count,
+    const QModelIndex &index)
+{
+    beginRemoveRows(QModelIndex(), row, row + count - 1);
+    if ((row + count - 1) > certificates.size()) {
+        return false;
+    }
+    for (int i = row + count - 1; i >= row; i--) {
+        if (!certificates.at(i).isEditable()) {
+            certificates.removeAt(i);
+        }
+    }
+    endRemoveRows();
+    return true;
+}
+
 QVariant CertificateTabelModel::data(const QModelIndex &index,
         int role) const
 {