NavigationContainer: Also add bottom margin with tabs on top

src/lib/navigation/navigationcontainer.cpp

@@ -1,6 +1,6 @@
 /* ============================================================
 * Falkon - Qt web browser
-* Copyright (C) 2013-2016  David Rosca <nowrep@gmail.com>
+* Copyright (C) 2013-2018 David Rosca <nowrep@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
@@ -29,8 +29,8 @@ NavigationContainer::NavigationContainer(QWidget* parent)
     m_layout = new QVBoxLayout(this);
     m_layout->setContentsMargins(0, 0, 0, 0);
     m_layout->setSpacing(0);
-
     setLayout(m_layout);
+
     setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Maximum);
 }
 
@@ -53,7 +53,7 @@ void NavigationContainer::toggleTabsOnTop(bool enable)
 
     m_layout->removeWidget(m_tabBar);
     m_layout->insertWidget(enable ? 0 : m_layout->count(), m_tabBar);
-    m_layout->setContentsMargins(0, enable ? 2 : 0, 0, 0);
+    m_layout->setContentsMargins(0, enable ? 2 : 0, 0, enable ? 2 : 0);
 
     setUpdatesEnabled(true);
 }