Refine inline transformation UX (#12939)

https://github.com/zed-industries/zed/assets/482957/1790e32e-1f59-4831-8a4c-722cf441e7e9



Release Notes:

- N/A

---------

Co-authored-by: Richard <richard@zed.dev>
Co-authored-by: Nathan <nathan@zed.dev>

crates/markdown_preview/src/markdown_preview_view.rs

@@ -294,7 +294,7 @@ impl MarkdownPreviewView {
 
         let subscription = cx.subscribe(&editor, |this, editor, event: &EditorEvent, cx| {
             match event {
-                EditorEvent::Edited => {
+                EditorEvent::Edited { .. } => {
                     this.parse_markdown_from_active_editor(true, cx);
                 }
                 EditorEvent::SelectionsChanged { .. } => {