gpui: Don't panic on failing to set X11 cursor style (#21689)

One more panic (well, two) that should be a `log_err`.

Release Notes:

- N/A

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

@@ -9,6 +9,7 @@ use std::time::{Duration, Instant};
 use calloop::generic::{FdWrapper, Generic};
 use calloop::{EventLoop, LoopHandle, RegistrationToken};
 
+use anyhow::Context as _;
 use collections::HashMap;
 use http_client::Url;
 use smallvec::SmallVec;
@@ -1417,9 +1418,10 @@ impl LinuxClient for X11Client {
                     ..Default::default()
                 },
             )
-            .expect("failed to change window cursor")
-            .check()
-            .unwrap();
+            .anyhow()
+            .and_then(|cookie| cookie.check().anyhow())
+            .context("setting cursor style")
+            .log_err();
     }
 
     fn open_uri(&self, uri: &str) {