Add RETRANSLATE macro to CalamaresUtils::Retranslator.

src/libcalamares/utils/Retranslator.h

@@ -42,6 +42,10 @@ private:
     std::function< void( void ) > m_retranslateFunc;
 };
 
+
 } // namespace CalamaresUtils
 
+#define RETRANSLATE(a) \
+    new CalamaresUtils::Retranslator( this, [this] { a } );
+
 #endif // CALAMARESUTILS_RETRANSLATOR_H

src/modules/locale/LocalePage.cpp

@@ -121,11 +121,10 @@ LocalePage::LocalePage( QWidget* parent )
         m_blockTzWidgetSet = false;
     });
 
-    new CalamaresUtils::Retranslator( this, [this]
-    {
+    RETRANSLATE(
         m_cityLabel->setText( tr( "Region:" ) );
         m_timezoneLabel->setText( tr( "Zone:" ) );
-    } );
+    )
 }