fix(editor): split at the start of list with children (#10244)

tests/kit/src/utils/keyboard.ts

@@ -32,6 +32,12 @@ export async function pressEnter(page: Page, count = 1) {
   }
 }
 
+export async function pressArrowUp(page: Page, count = 1) {
+  for (let i = 0; i < count; i++) {
+    await page.keyboard.press('ArrowUp', { delay: 50 });
+  }
+}
+
 export async function pressTab(page: Page) {
   await page.keyboard.press('Tab', { delay: 50 });
 }