use default label text on value is empty

src/browser/main/tab/label/title.rs

@@ -1,5 +1,7 @@
 use gtk::{glib::GString, pango::EllipsizeMode, Label};
 
+const DEFAULT_LABEL_TEXT: &str = "New page";
+
 pub struct Title {
     widget: Label,
 }
@@ -9,7 +11,7 @@ impl Title {
     pub fn new() -> Self {
         Self {
             widget: Label::builder()
-                .label("New page")
+                .label(DEFAULT_LABEL_TEXT)
                 .ellipsize(EllipsizeMode::End)
                 .width_chars(16)
                 .single_line_mode(true)
@@ -21,7 +23,7 @@ impl Title {
     pub fn update(&self, title: Option<&GString>) {
         match title {
             Some(title) => self.widget.set_text(title),
-            None => self.widget.set_text(""), // @TODO None/false option
+            None => self.widget.set_text(DEFAULT_LABEL_TEXT),
         }
     }