editor: Fix cursor shape not restoring when setting removed (#18379)

Closes #18119

Release Notes:

- Fixed the cursor shape in the editor not changing back to default when
`{"cursor_shape": "..."}` setting is removed. (Does not apply to Vim
mode.)

crates/vim/src/vim.rs

@@ -389,6 +389,7 @@ impl Vim {
             }
             EditorEvent::Edited { .. } => self.push_to_change_list(cx),
             EditorEvent::FocusedIn => self.sync_vim_settings(cx),
+            EditorEvent::CursorShapeChanged => self.cursor_shape_changed(cx),
             _ => {}
         }
     }
@@ -679,6 +680,12 @@ impl Vim {
         });
     }
 
+    fn cursor_shape_changed(&mut self, cx: &mut ViewContext<Self>) {
+        self.update_editor(cx, |vim, editor, cx| {
+            editor.set_cursor_shape(vim.cursor_shape(), cx);
+        });
+    }
+
     fn update_editor<S>(
         &mut self,
         cx: &mut ViewContext<Self>,