[netinstall] Initial work for configurable sidebar label

- Now that multiple netinstall pages may be supported, it's annoying
  that they all have the same name. Copy the approach from other
  modules (e.g. notesQML) of having the sidebar and other labels
  configured in the config file.

src/modules/netinstall/NetInstallViewStep.cpp

@@ -34,6 +34,7 @@ NetInstallViewStep::NetInstallViewStep( QObject* parent )
     : Calamares::ViewStep( parent )
     , m_widget( new NetInstallPage() )
     , m_nextEnabled( false )
+    , m_sidebarLabel( nullptr )
 {
     emit nextStatusChanged( true );
     connect( m_widget, &NetInstallPage::checkReady, this, &NetInstallViewStep::nextIsReady );
@@ -46,13 +47,14 @@ NetInstallViewStep::~NetInstallViewStep()
     {
         m_widget->deleteLater();
     }
+    delete m_sidebarLabel;
 }
 
 
 QString
 NetInstallViewStep::prettyName() const
 {
-    return tr( "Package selection" );
+    return m_sidebarLabel ? m_sidebarLabel->get() : tr( "Package selection" );
 }
 
 

src/modules/netinstall/NetInstallViewStep.h

@@ -20,10 +20,10 @@
 #ifndef NETINSTALLVIEWSTEP_H
 #define NETINSTALLVIEWSTEP_H
 
-#include <utils/PluginFactory.h>
-#include <viewpages/ViewStep.h>
-
-#include <DllMacro.h>
+#include "DllMacro.h"
+#include "locale/TranslatableConfiguration.h"
+#include "utils/PluginFactory.h"
+#include "viewpages/ViewStep.h"
 
 #include <QVariant>
 
@@ -64,7 +64,7 @@ private:
     NetInstallPage* m_widget;
     bool m_nextEnabled;
     QString m_prettyStatus;
-
+    CalamaresUtils::Locale::TranslatedString* m_sidebarLabel;  // As it appears in the sidebar
     QList< Calamares::job_ptr > m_jobs;
 };