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/gpui/src/key_dispatch.rs

@@ -16,7 +16,7 @@
 /// impl Render for Editor {
 ///   fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
 ///     div()
-///       .track_focus(&self.focus_handle)
+///       .track_focus(&self.focus_handle(cx))
 ///       .keymap_context("Editor")
 ///       .on_action(cx.listener(Editor::undo))
 ///       .on_action(cx.listener(Editor::redo))