keymap_ui: Improve keybind display in menus (#34587)

Closes #ISSUE

Defines keybindings for `keymap_editor::EditBinding` and
`keymap_editor::CreateBinding`, making sure those actions are used in
tooltips.

Release Notes:

- N/A *or* Added/Fixed/Improved ...

---------

Co-authored-by: Finn <dev@bahn.sh>

crates/ui/src/components/context_menu.rs

@@ -972,12 +972,10 @@ impl ContextMenu {
                             .children(action.as_ref().and_then(|action| {
                                 self.action_context
                                     .as_ref()
-                                    .map(|focus| {
+                                    .and_then(|focus| {
                                         KeyBinding::for_action_in(&**action, focus, window, cx)
                                     })
-                                    .unwrap_or_else(|| {
-                                        KeyBinding::for_action(&**action, window, cx)
-                                    })
+                                    .or_else(|| KeyBinding::for_action(&**action, window, cx))
                                     .map(|binding| {
                                         div().ml_4().child(binding.disabled(*disabled)).when(
                                             *disabled && documentation_aside.is_some(),