rename wrapper mod to window

src/app/browser/wrapper/tab/label/pin.rs

@@ -1,22 +0,0 @@
-use gtk::Image;
-
-pub struct Pin {
-    widget: Image,
-}
-
-impl Pin {
-    // Construct
-    pub fn new(visible: bool) -> Pin {
-        let widget = Image::builder()
-            .icon_name("view-pin-symbolic")
-            .visible(visible)
-            .build();
-
-        Self { widget }
-    }
-
-    // Getters
-    pub fn widget(&self) -> &Image {
-        &self.widget
-    }
-}