[partition] Reduce confused naming

src/modules/packagechooser/Config.h

@@ -72,7 +72,7 @@ public:
      */
     void updateGlobalStorage( const QStringList& selected ) const;
     /// As updateGlobalStorage() with an empty selection list
-    void updateGlobalStorage() const { updateGlobalStorage( QStringList() ); }
+    void fillGSSecondaryConfiguration() const { updateGlobalStorage( QStringList() ); }
 
 private:
     PackageListModel* m_model = nullptr;

src/modules/partition/Config.cpp

@@ -295,7 +295,7 @@ Config::setConfigurationMap( const QVariantMap& configurationMap )
 }
 
 void
-Config::updateGlobalStorage() const
+Config::fillGSSecondaryConfiguration() const
 {
     // If there's no setting (e.g. from the welcome page) for required storage
     // then use ours, if it was set.

src/modules/partition/Config.h

@@ -60,7 +60,16 @@ public:
     using EraseFsTypesSet = QStringList;
 
     void setConfigurationMap( const QVariantMap& );
-    void updateGlobalStorage() const;
+    /** @brief Set GS values where other modules configuration has priority
+     *
+     * Some "required" values are duplicated between modules; if some
+     * othe module hasn't already set the GS value, take a value from
+     * the partitioning configuration.
+     *
+     * Applicable GS keys:
+     *  - requiredStorageGiB
+     */
+    void fillGSSecondaryConfiguration() const;
 
     /** @brief What kind of installation (partitioning) is requested **initially**?
      *

src/modules/partition/PartitionViewStep.cpp

@@ -368,7 +368,7 @@ PartitionViewStep::isAtEnd() const
 void
 PartitionViewStep::onActivate()
 {
-    m_config->updateGlobalStorage();
+    m_config->fillGSSecondaryConfiguration();
 
     // if we're coming back to PVS from the next VS
     if ( m_widget->currentWidget() == m_choicePage && m_config->installChoice() == Config::InstallChoice::Alongside )