wayland: Fix window bounds restoration (#12581)

Fixes multiple issues that prevented window bounds restoration to not
work on Wayland.

Note: Since the display uuid depends on the `wl_output.name` field, this
only works properly on KDE 5.26+ or Gnome 44+ ([kwin
commit](330a02d862),
[mutter](7e838b1115)).

Release Notes:

- N/A

crates/gpui/src/geometry.rs

@@ -712,7 +712,7 @@ impl Size<Length> {
 /// assert_eq!(bounds.origin, origin);
 /// assert_eq!(bounds.size, size);
 /// ```
-#[derive(Refineable, Clone, Default, Debug, Eq, PartialEq)]
+#[derive(Refineable, Clone, Default, Debug, Eq, PartialEq, Hash)]
 #[refineable(Debug)]
 #[repr(C)]
 pub struct Bounds<T: Clone + Default + Debug> {