[packagechooser] Simplify parameters

- Just pass the no-package-selected item around.

src/modules/packagechooser/PackageChooserPage.cpp

@@ -164,9 +164,8 @@ PackageChooserPage::selectedPackageIds() const
 }
 
 void
-PackageChooserPage::setIntroduction( const CalamaresUtils::Locale::TranslatedString& name,
-                                     const CalamaresUtils::Locale::TranslatedString& description )
+PackageChooserPage::setIntroduction( const PackageItem& item )
 {
-    m_introduction.name = name;
-    m_introduction.description = description;
+    m_introduction.name = item.name;
+    m_introduction.description = item.description;
 }

src/modules/packagechooser/PackageChooserPage.h

@@ -21,8 +21,6 @@
 
 #include "PackageModel.h"
 
-#include "locale/TranslatableConfiguration.h"
-
 #include <QAbstractItemModel>
 #include <QWidget>
 
@@ -40,8 +38,7 @@ public:
     void setModel( QAbstractItemModel* model );
 
     /// @brief Sets the introductory (no-package-selected) texts
-    void setIntroduction( const CalamaresUtils::Locale::TranslatedString& name,
-                          const CalamaresUtils::Locale::TranslatedString& description );
+    void setIntroduction( const PackageItem& item );
     /// @brief Is anything selected?
     bool hasSelection() const;
     /** @brief Get the list of selected ids

src/modules/packagechooser/PackageChooserViewStep.cpp

@@ -288,7 +288,7 @@ PackageChooserViewStep::hookupModel()
         const auto& package = m_model->packageData( i );
         if ( package.id.isEmpty() )
         {
-            m_widget->setIntroduction( package.name, package.description );
+            m_widget->setIntroduction( package );
             break;
         }
     }