Collapsing a post a message replies to shouldn't make the window scrolls down

[Canapin (Coin-coin le Canapin)]

Hi

This is a very minor annoyance hard to describe in the title

When we reply to a post, we can click on a button to reveal the post it replies to.

When we collapse the block, the window automatically scrolls down so the current post is to the very top.

Ideally, the scroll position should remain the same.

Steps:

1. Find a post that replies to another post.

2. Click the button to reveal the post it replies to.

3. Collapse the content revealed.

4. The window scrolls down to make the current post to the very top.