init multi-window implementation

src/Entity/Browser/History/Container/Navbar/Open.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Yoda\Entity\Browser\History\Container\Navbar;
+
+class Open extends \Yggverse\Yoda\Abstract\Entity\Browser\History\Container\Navbar\Button
+{
+    protected string $_label = 'Open';
+
+    protected function _onCLick(
+        \GtkButton $entity
+    ): void
+    {
+        $this->navbar->container->history->browser->container->tab->append(
+            $this->navbar->container->content->getSelectedUrl()
+        );
+    }
+
+    public function refresh(): void
+    {
+        $this->gtk->set_sensitive(
+            boolval(
+                $this->navbar->container->content->getSelectedId()
+            )
+        );
+    }
+}