[netinstall] Allow a title above the netinstall tree

- Supports translation via the config file. This is useful
  (like label:sidebar) when displaying more than one netinstall page.

src/modules/netinstall/NetInstallPage.cpp

@@ -41,6 +41,7 @@ NetInstallPage::NetInstallPage( QWidget* parent )
     , m_groups( nullptr )
 {
     ui->setupUi( this );
+    setPageTitle( nullptr );
     CALAMARES_RETRANSLATE_SLOT( &NetInstallPage::retranslate );
 }
 
@@ -50,6 +51,22 @@ NetInstallPage::~NetInstallPage()
     delete m_reply;
 }
 
+void
+NetInstallPage::setPageTitle( CalamaresUtils::Locale::TranslatedString* t )
+{
+    m_title.reset( t );
+    if ( !m_title )
+    {
+        ui->label->hide();
+    }
+    else
+    {
+        ui->label->show();
+    }
+    retranslate();
+}
+
+
 void
 NetInstallPage::retranslate()
 {
@@ -58,6 +75,10 @@ NetInstallPage::retranslate()
         m_groups->setHeaderData( 0, Qt::Horizontal, tr( "Name" ) );
         m_groups->setHeaderData( 1, Qt::Horizontal, tr( "Description" ) );
     }
+    if ( ui && m_title )
+    {
+        ui->label->setText( m_title->get() );  // That's get() on the TranslatedString
+    }
 }
 
 bool

src/modules/netinstall/NetInstallPage.h

@@ -24,9 +24,13 @@
 #include "PackageModel.h"
 #include "PackageTreeItem.h"
 
+#include "locale/TranslatableConfiguration.h"
+
 #include <QString>
 #include <QWidget>
 
+#include <memory>
+
 class QNetworkReply;
 
 namespace Ui
@@ -41,6 +45,17 @@ public:
     NetInstallPage( QWidget* parent = nullptr );
     virtual ~NetInstallPage();
 
+    /** @brief Sets the page title
+     *
+     * In situations where there is more than one netinstall page,
+     * or you want some explanatory title above the treeview,
+     * set the page title. This page takes ownership of the
+     * TranslatedString object.
+     *
+     * Set to nullptr to remove the title.
+     */
+    void setPageTitle( CalamaresUtils::Locale::TranslatedString* );
+
     void onActivate();
 
     /** @brief Retrieves the groups, with name, description and packages
@@ -77,6 +92,8 @@ private:
 
     Ui::Page_NetInst* ui;
 
+    std::unique_ptr< CalamaresUtils::Locale::TranslatedString > m_title;  // Above the treeview
+
     QNetworkReply* m_reply;
     PackageModel* m_groups;
     bool m_required;

src/modules/netinstall/NetInstallViewStep.cpp

@@ -203,6 +203,6 @@ NetInstallViewStep::setConfigurationMap( const QVariantMap& configurationMap )
     }
     if ( label.contains( "title" ) )
     {
-        // Set that label on the page
+        m_widget->setPageTitle( new CalamaresUtils::Locale::TranslatedString( label, "title" ) );
     }
 }

src/modules/netinstall/page_netinst.ui

@@ -14,6 +14,16 @@
    <string/>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout_2">
+   <item>
+    <widget class="QLabel" name="label">
+     <property name="text">
+      <string>Title of Netinstall Module</string>
+     </property>
+     <property name="alignment">
+      <set>Qt::AlignCenter</set>
+     </property>
+    </widget>
+   </item>
    <item>
     <widget class="QScrollArea" name="scrollArea">
      <property name="maximumSize">
@@ -31,7 +41,7 @@
         <x>0</x>
         <y>0</y>
         <width>981</width>
-        <height>434</height>
+        <height>407</height>
        </rect>
       </property>
       <property name="font">