fix: prevent flickering prompt when pulling same image from N services

[maxcleme]

Signed-off-by: Maxime CLEMENT maxime.clement@docker.com

What I did

Prevent event's parent to be swapped for another, since it uses the same ID it would make the prompt to flicker.

Current issue can be seen by using the following compose file :

services:
  a:
    image: ubuntu:22.10
  b:
    image: ubuntu:22.10

Note: Use both same large images to make the issue appear longer

Related issue

Fixes #9469

(not mandatory) A picture of a cute animal, if possible in relation with what you did

[glours]

LGTM