[summaryq] Repair translatable properties

- doesn't make sense to have NOTIFY and CONSTANT
- connect to translation signals
- document the properties

src/modules/summaryq/Config.cpp

@@ -14,7 +14,6 @@
 #include "Branding.h"
 #include "Settings.h"
 #include "ViewManager.h"
-
 #include "utils/CalamaresUtilsGui.h"
 #include "utils/Logger.h"
 #include "utils/Retranslator.h"
@@ -73,16 +72,30 @@ Config::Config( QObject* parent )
     : QObject( parent )
     , m_thisViewStep( static_cast< SummaryQmlViewStep* >( parent ) )
     , m_summary( new SummaryModel( this ) )
+
+{
+    CALAMARES_RETRANSLATE_SLOT( &Config::retranslate );
+    retranslate();
+}
+
+void
+Config::retranslate()
 {
     m_title = m_thisViewStep->prettyName();
 
     if ( Calamares::Settings::instance()->isSetupMode() )
+    {
         m_message = ( tr( "This is an overview of what will happen once you start "
                           "the setup procedure." ) );
+    }
     else
+    {
         m_message = ( tr( "This is an overview of what will happen once you start "
                           "the install procedure." ) );
     }
+    Q_EMIT titleChanged();
+    Q_EMIT messageChanged();
+}
 
 void
 Config::componentComplete()

src/modules/summaryq/Config.h

@@ -52,8 +52,12 @@ private:
 class Config : public QObject, public QQmlParserStatus
 {
     Q_OBJECT
-    Q_PROPERTY( QString message MEMBER m_message NOTIFY messageChanged CONSTANT )
-    Q_PROPERTY( QString title MEMBER m_title NOTIFY titleChanged CONSTANT )
+
+    ///@brief Name of this summary (generally, "Summary")
+    Q_PROPERTY( QString title MEMBER m_title NOTIFY titleChanged )
+    ///@brief Description of what the summary means
+    Q_PROPERTY( QString message MEMBER m_message NOTIFY messageChanged )
+
     Q_PROPERTY( SummaryModel* summaryModel READ summaryModel CONSTANT FINAL )
 
 public:
@@ -68,6 +72,8 @@ public:
 
 private:
     Calamares::ViewStepList stepsForSummary( const Calamares::ViewStepList& allSteps ) const;
+    void retranslate();
+
     const SummaryQmlViewStep* m_thisViewStep;
     SummaryModel* m_summary;