Add support for experimental xx_foreign_toplevel_geometry_tracker_v1 (#1)

Co-authored-by: entailz <entail-wraps0r@icloud.com>
Reviewed-on: wry/wry#1
Co-authored-by: entailz <entailzwrapped@proton.me>
Co-committed-by: entailz <entailzwrapped@proton.me>

src/tree/tab_bar.rs

@@ -1,12 +1,9 @@
 use {
-    crate::{
-        scale::Scale,
-        state::State,
-        text::TextTexture,
-        theme::Color,
-        tree::NodeId,
+    crate::{scale::Scale, state::State, text::TextTexture, theme::Color, tree::NodeId},
+    std::{
+        cell::{Cell, RefCell},
+        rc::Rc,
     },
-    std::{cell::{Cell, RefCell}, rc::Rc},
 };
 
 /// A single entry (tab) within a tab bar.