Windows: fix initial active status (#9694)

Separate from #9451

On Windows, a new window may already active immediate after creation.

Release Notes:

- N/A

---------

Co-authored-by: Mikayla <mikayla@zed.dev>

crates/gpui/src/platform/linux/x11/window.rs

@@ -406,6 +406,11 @@ impl PlatformWindow for X11Window {
             .unwrap();
     }
 
+    // todo(linux)
+    fn is_active(&self) -> bool {
+        false
+    }
+
     fn set_title(&mut self, title: &str) {
         self.0
             .xcb_connection