[summary] Create Config object

- Create Config object, even if it's not used just yet
- Introduce onLeave() for the Page, better name than
  (re-)creating the content (!?) when leaving

src/modules/summary/SummaryPage.cpp

@@ -166,6 +166,13 @@ SummaryPage::createContentWidget()
     CalamaresUtils::unmarginLayout( m_layout );
 }
 
+void
+SummaryPage::onLeave()
+{
+    delete m_contentWidget;
+    m_contentWidget = nullptr;
+}
+
 QLabel*
 SummaryPage::createTitleLabel( const QString& text ) const
 {

src/modules/summary/SummaryPage.h

@@ -44,11 +44,14 @@ class SummaryPage : public QWidget
 public:
     explicit SummaryPage( const SummaryViewStep* thisViewStep, QWidget* parent = nullptr );
 
+    /// @brief Create contents showing all of the summary
     void onActivate();
-    void createContentWidget();
+    /// @brief Clean up the widgets
+    void onLeave();
 
 private:
     Calamares::ViewStepList stepsForSummary( const Calamares::ViewStepList& allSteps ) const;
+    void createContentWidget();
 
     const SummaryViewStep* m_thisViewStep;
 

src/modules/summary/SummaryViewStep.cpp

@@ -16,6 +16,7 @@ CALAMARES_PLUGIN_FACTORY_DEFINITION( SummaryViewStepFactory, registerPlugin< Sum
 SummaryViewStep::SummaryViewStep( QObject* parent )
     : Calamares::ViewStep( parent )
     , m_widget( new SummaryPage( this ) )
+    , m_config( new Config( this ) )
 {
     emit nextStatusChanged( true );
 }
@@ -27,6 +28,7 @@ SummaryViewStep::~SummaryViewStep()
     {
         m_widget->deleteLater();
     }
+    delete m_config;
 }
 
 
@@ -82,6 +84,7 @@ SummaryViewStep::jobs() const
 void
 SummaryViewStep::onActivate()
 {
+    m_config->init();
     m_widget->onActivate();
 }
 
@@ -89,5 +92,5 @@ SummaryViewStep::onActivate()
 void
 SummaryViewStep::onLeave()
 {
-    m_widget->createContentWidget();
+    m_widget->onLeave();
 }

src/modules/summary/SummaryViewStep.h

@@ -10,6 +10,8 @@
 #ifndef SUMMARYPAGEPLUGIN_H
 #define SUMMARYPAGEPLUGIN_H
 
+#include "Config.h"
+
 #include "DllMacro.h"
 #include "utils/PluginFactory.h"
 #include "viewpages/ViewStep.h"
@@ -40,7 +42,8 @@ public:
     void onLeave() override;
 
 private:
-    SummaryPage* m_widget;
+    SummaryPage* m_widget = nullptr;
+    Config* m_config = nullptr;
 };
 
 CALAMARES_PLUGIN_FACTORY_DECLARATION( SummaryViewStepFactory )