init navbar components

src/app/browser/main/tab/page/navigation/history.rs

@@ -0,0 +1,34 @@
+#[path = "history/back.rs"] mod back;
+#[path = "history/forward.rs"] mod forward;
+
+use gtk::Box;
+use gtk::prelude::BoxExt;
+
+pub fn new() -> Box
+{
+    let history = Box::builder()
+
+        // Tuneup
+        .orientation(
+            gtk::Orientation::Horizontal
+        )
+
+        .css_classes(
+            [
+                "linked" // merge childs
+            ]
+        )
+
+        .build();
+
+    // Compose childs
+    history.append(
+        &back::new()
+    );
+
+    history.append(
+        &forward::new()
+    );
+
+    return history;
+}