Proper include, and layout fix.

src/calamares/CalamaresWindow.cpp

@@ -20,7 +20,7 @@
 
 #include "ViewManager.h"
 
-#include "QBoxLayout"
+#include <QBoxLayout>
 
 CalamaresWindow::CalamaresWindow( QWidget* parent )
     : QWidget( parent )

src/calamares/ViewManager.cpp

@@ -37,9 +37,14 @@ ViewManager::ViewManager( QObject* parent )
 {
     s_instance = this;
     QBoxLayout* mainLayout = new QVBoxLayout;
+    mainLayout->setContentsMargins( 0, 0, 0, 0 );
+    m_widget->setContentsMargins( 0, 0, 0, 0 );
+    mainLayout->setMargin( 0 );
+    mainLayout->setSpacing( 0 );
     m_widget->setLayout( mainLayout );
 
     m_stack = new QStackedWidget( m_widget );
+    m_stack->setContentsMargins( 0, 0, 0, 0 );
     mainLayout->addWidget( m_stack );
 
     m_back = new QPushButton( tr( "&Back" ), m_widget );
@@ -66,6 +71,34 @@ ViewManager::widget()
 }
 
 
+void
+ViewManager::addPagePlugin( PagePlugin* plugin )
+{
+
+}
+
+
+void
+ViewManager::insertPage( AbstractPage* page )
+{
+
+}
+
+
+void
+ViewManager::setNext( AbstractPage* page )
+{
+
+}
+
+
+void
+ViewManager::removePage( AbstractPage* page )
+{
+
+}
+
+
 void
 ViewManager::next()
 {