init update navigation button

src/app/browser/main/tab/data/navbar.cpp

@@ -1,5 +1,6 @@
 #include "navbar.hpp"
 #include "navbar/base.hpp"
+#include "navbar/update.hpp"
 
 using namespace app::browser::main::tab::data;
 
@@ -10,16 +11,38 @@ Navbar::Navbar()
         Gtk::Orientation::HORIZONTAL
     );
 
-    set_homogeneous(
-        true
+    set_spacing(
+        SPACING
+    );
+
+    set_margin_top(
+        MARGIN
+    );
+
+    set_margin_start(
+        MARGIN
+    );
+
+    set_margin_end(
+        MARGIN
+    );
+
+    set_margin_bottom(
+        MARGIN
     );
 
     // Init elements
     base = new navbar::Base();
 
-    append(
-        * base
-    );
+        append(
+            * base
+        );
+
+    update = new navbar::Update();
+
+        append(
+            * update
+        );
 }
 
 Navbar::~Navbar() = default;