draft tab update action

src/app/browser/header/menu.cpp

@@ -17,6 +17,11 @@ Menu::Menu()
             "win.tab_append"
         );
 
+        tab->append(
+            _("Update"),
+            "tab.update"
+        );
+
         // Build tab close submenu model
         tab_close = Gio::Menu::create();
 

src/main.cpp

@@ -32,6 +32,11 @@ int main(
         "<Primary>t"
     );
 
+    app->set_accel_for_action(
+        "tab.update",
+        "<Primary>r"
+    );
+
     app->set_accel_for_action(
         "win.debug",
         "<Primary>i"