[locale] Update global locale setting when it changes

- use debugging to be a little more chatty
 - when changing the system language on the locale page,
   the global locale setting should change, too.

src/modules/locale/LocalePage.cpp

@@ -137,6 +137,7 @@ LocalePage::LocalePage( QWidget* parent )
     connect( m_tzWidget, &TimeZoneWidget::locationChanged,
              [this]( LocaleGlobal::Location location )
     {
+        cDebug() << "Updating location from TZ widget to" << location;
         m_blockTzWidgetSet = true;
 
         // Set region index
@@ -173,6 +174,7 @@ LocalePage::LocalePage( QWidget* parent )
         {
             m_selectedLocaleConfiguration.lang = dlg->selectedLCLocale();
             m_selectedLocaleConfiguration.explicit_lang = true;
+            this->updateGlobalLocale();
             this->updateLocaleLabels();
         }
 
@@ -441,6 +443,7 @@ LocalePage::onActivate()
     {
         auto newLocale = guessLocaleConfiguration();
         m_selectedLocaleConfiguration.lang = newLocale.lang;
+        updateGlobalLocale();
         updateLocaleLabels();
     }
 }
@@ -487,6 +490,7 @@ LocalePage::updateGlobalLocale()
 {
     auto *gs = Calamares::JobQueue::instance()->globalStorage();
     const QString bcp47 = m_selectedLocaleConfiguration.toBcp47();
+    cDebug() << "Updating global locale setting to" << bcp47;
     gs->insert( "locale", bcp47 );
 }