Bug: Problem with the scroll behavior of the router

**Describe the bug**
Scroll behavior is not working properly

**To Reproduce**
Steps to reproduce the behavior:
1. Go to outings page
2. Scroll a bit
3. Clik on an outing
4. Go back
5. *you've lost your previous position, you're on top, wasn't it supposed to be saved?*
6. Scroll down and select an outing
7. You're not at the top of the outing

**Expected behavior**
Scroll should be correctly applied when you go back, and not in other cases

Start by reproducing the scroll behavior on the outings page using the steps in the issue, then inspect the router's scroll handling. Done means returning to an outing restores the previous position, while opening an outing after scrolling starts it at the top.

Written by the indexing model from the issue text.