ui: Render keybinds for disabled actions with disabled color (#27693)

This PR ensures that keybinds for disabled actions in context menus are
also colored according th their disabled state.

### Default

| Current `main` | This PR | 
| --- | --- | 
| <img width="212" alt="main_default"
src="https://github.com/user-attachments/assets/c9f24f4b-dff1-4930-9a3c-07ce1fad516a"
/> | <img width="212" alt="pr_default"
src="https://github.com/user-attachments/assets/fd3db1b8-3a46-4b17-81e7-de66b35b4a79"
/> |

### Vim-Mode

| Current `main` | This PR | 
| --- | --- | 
| <img width="255" alt="main_vim"
src="https://github.com/user-attachments/assets/2845efd3-0109-4e00-af92-203a328d6282"
/> | <img width="255" alt="pr_vim"
src="https://github.com/user-attachments/assets/af073173-30c0-4a60-942f-0f124089c723"
/>|


Release Notes:

- Keybinds in contexts menus will now also be dimmed if the
corresponding action is currently disabled.

crates/ui/src/components/context_menu.rs

@@ -752,7 +752,7 @@ impl ContextMenu {
                                         KeyBinding::for_action(&**action, window, cx)
                                     })
                                     .map(|binding| {
-                                        div().ml_4().child(binding).when(
+                                        div().ml_4().child(binding.disabled(*disabled)).when(
                                             *disabled && documentation_aside_callback.is_some(),
                                             |parent| parent.invisible(),
                                         )