gpui: Press enter, space to trigger click to focused element (#35075)

Release Notes:

- N/A

> Any user interaction that is equivalent to a click, such as pressing
the Space key or Enter key while the element is focused. Note that this
only applies to elements with a default key event handler, and
therefore, excludes other elements that have been made focusable by
setting the
[tabindex](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes/tabindex)
attribute.

https://developer.mozilla.org/en-US/docs/Web/API/Element/click_event

---------

Co-authored-by: Anthony <anthony@zed.dev>
Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Co-authored-by: Umesh Yadav <23421535+imumesh18@users.noreply.github.com>

crates/outline_panel/src/outline_panel.rs

@@ -2570,11 +2570,11 @@ impl OutlinePanel {
             .on_click({
                 let clicked_entry = rendered_entry.clone();
                 cx.listener(move |outline_panel, event: &gpui::ClickEvent, window, cx| {
-                    if event.down.button == MouseButton::Right || event.down.first_mouse {
+                    if event.is_right_click() || event.first_focus() {
                         return;
                     }
 
-                    let change_focus = event.down.click_count > 1;
+                    let change_focus = event.click_count() > 1;
                     outline_panel.toggle_expanded(&clicked_entry, window, cx);
 
                     outline_panel.scroll_editor_to_entry(