[vim/vim] Screen is not redrawn while the hit-enter prompt is up (Issue #21052)

XiaowenHu96 created an issue (vim/vim#21052)

### Steps to reproduce

**Steps to reproduce**

```vim
" repro.vim
call popup_menu(['one'], {})
redraw!
echomsg repeat('x', &columns * 2)
```

```
vim -u NONE -N -i NONE -S repro.vim
```

1. A popup is shown, and the `Press ENTER or type command to continue` prompt is
   armed by the long message.
2. Press `<CR>`. **Nothing appears to happen** — the screen is byte-for-byte
   identical.
3. Press `<CR>` again. Both the popup and the prompt disappear at once.


### Expected behaviour

**Expected**

After step 2 the popup is gone, so the screen should no longer show it.

### Version of Vim

9.2.0957

### Environment

NAME="Arch Linux"
PRETTY_NAME="Arch Linux"
ID=arch
BUILD_ID=rolling


### Logs and stack traces

```shell

```

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