zeta: Always show ghost text, even if showing completion in menu (#22194)

See:
![screenshot-2024-12-18-17 26
22@2x](https://github.com/user-attachments/assets/82bdea76-6c96-4c4d-a08a-1601381a378f)


https://github.com/user-attachments/assets/165d9f0d-8339-4fd9-a796-a67121689af6



Release Notes:

- N/A

Co-authored-by: Danilo <danilo@zed.dev>

crates/editor/src/code_context_menus.rs

@@ -575,7 +575,7 @@ impl CompletionsMenu {
             }
             CompletionEntry::InlineCompletionHint(hint) => match &hint.text {
                 InlineCompletionText::Edit { text, highlights } => div()
-                    .my_1()
+                    .mx_1()
                     .rounded(px(6.))
                     .bg(cx.theme().colors().editor_background)
                     .border_1()
@@ -594,7 +594,7 @@ impl CompletionsMenu {
                     multiline_docs
                         .id("multiline_docs")
                         .max_h(max_height)
-                        .px_0p5()
+                        .px_2()
                         .min_w(px(260.))
                         .max_w(MAX_COMPLETIONS_ASIDE_WIDTH)
                         .overflow_y_scroll()