init navbar components

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

@@ -0,0 +1,22 @@
+use gtk::Entry;
+
+pub fn new() -> Entry
+{
+    let entry = Entry::builder()
+
+        .placeholder_text(
+            "URL or search term..."
+        )
+
+        .hexpand(
+            true
+        )
+
+        .progress_pulse_step(
+            0.1
+        )
+
+        .build();
+
+    return entry;
+}