implement refresh method for update

src/app/browser/main/tab/page/navigation.cpp

@@ -107,7 +107,7 @@ void Navigation::refresh(
     navigationHistory->refresh();
 
     // Toggle update button sensibility
-    navigationUpdate->set_sensitive(
+    navigationUpdate->refresh(
         navigationRequest->get_text_length() > 0
     );
 

src/app/browser/main/tab/page/navigation/update.cpp

@@ -17,10 +17,9 @@ Update::Update(
         _("Update")
     );
 
-    /* @TODO
     set_sensitive(
         false
-    ); */
+    );
 
     signal_clicked().connect(
         [this]
@@ -29,3 +28,15 @@ Update::Update(
         }
     );
 }
+
+void Update::refresh(
+    const bool & ENABLED
+) {
+    set_sensitive(
+        ENABLED
+    );
+
+    action__update->set_enabled(
+        ENABLED
+    );
+}

src/app/browser/main/tab/page/navigation/update.hpp

@@ -17,6 +17,10 @@ namespace app::browser::main::tab::page::navigation
             Update(
                 const Glib::RefPtr<Gio::SimpleAction> & ACTION__UPDATE
             );
+
+            void refresh(
+                const bool & ENABLED
+            );
     };
 }