Replace deprecated egui function

src/file_editor.rs

@@ -170,7 +170,7 @@ impl FileEditor {
                 dragger_rect.set_height(item_response.response.rect.height());
 
                 // Controls for moving the buffer item
-                ui.allocate_new_ui(
+                ui.scope_builder(
                     UiBuilder::new()
                         .max_rect(dragger_rect)
                         .layout(Layout::top_down(Align::Center)),