[finished] Rename and document following coding style

src/modules/finished/FinishedViewStep.cpp

@@ -29,7 +29,7 @@ FinishedViewStep::FinishedViewStep( QObject* parent )
     : Calamares::ViewStep( parent )
     , m_config( new Config( this ) )
     , m_widget( new FinishedPage() )
-    , installFailed( false )
+    , m_installFailed( false )
 {
     auto jq = Calamares::JobQueue::instance();
     connect( jq, &Calamares::JobQueue::failed, m_widget, &FinishedPage::onInstallationFailed );
@@ -94,7 +94,7 @@ FinishedViewStep::sendNotification()
 {
     // If the installation failed, don't send notification popup;
     // there's a (modal) dialog popped up with the failure notice.
-    if ( installFailed )
+    if ( m_installFailed )
     {
         return;
     }
@@ -151,7 +151,7 @@ FinishedViewStep::onInstallationFailed( const QString& message, const QString& d
 {
     Q_UNUSED( message )
     Q_UNUSED( details )
-    installFailed = true;
+    m_installFailed = true;
 }
 
 void

src/modules/finished/FinishedViewStep.h

@@ -50,16 +50,18 @@ public slots:
     void onInstallationFailed( const QString& message, const QString& details );
 
 private:
-    Config* m_config;
-    FinishedPage* m_widget;
-
     /**
-     * @brief At the end of installation (when this step is activated),
-     *      send a desktop notification via DBus that the install is done.
+     * @brief Send notification at the end via DBus
+     *
+     * At the end of installation (when this step is activated),
+     * send a desktop notification via DBus that the install is done.
+     * If the installation failed, no notification is sent.
      */
     void sendNotification();
 
-    bool installFailed;
+    Config* m_config;
+    FinishedPage* m_widget;
+    bool m_installFailed;  // Track if onInstallationFailed() was called
 };
 
 CALAMARES_PLUGIN_FACTORY_DECLARATION( FinishedViewStepFactory )