Fix mouse clicks on remote-open-folder UI (#19851)

Also change Zed's standard style to use
`.track_focus(&self.focus_handle(cx))`, instead of
`.track_focus(&self.focus_handle)`, to catch these kinds of errors more
easily in the future.

Release Notes:

- N/A

---------

Co-authored-by: Conrad <conrad@zed.dev>

crates/copilot/src/sign_in.rs

@@ -185,7 +185,7 @@ impl Render for CopilotCodeVerification {
 
         v_flex()
             .id("copilot code verification")
-            .track_focus(&self.focus_handle)
+            .track_focus(&self.focus_handle(cx))
             .elevation_3(cx)
             .w_96()
             .items_center()