On wayland, fix with_title() not setting the windows title (#770)

CHANGELOG.md

@@ -1,5 +1,6 @@
 # Unreleased
 
+- On Wayland, fix `with_title()` not setting the windows title
 - On Wayland, add `set_wayland_theme()` to control client decoration color theme
 - Added serde serialization to `os::unix::XWindowType`.
 - **Breaking:** `image` crate upgraded to 0.21. This is exposed as part of the `icon_loading` API.

src/platform/linux/wayland/window.rs

@@ -81,6 +81,8 @@ impl Window {
             frame.set_app_id(app_id);
         }
 
+        frame.set_title(attributes.title);
+
         for &(_, ref seat) in evlp.seats.lock().unwrap().iter() {
             frame.new_seat(seat);
         }