Fix sidebar slide-in animation

The slide-in animation when entering the different sections seems broken.

The issue seems to be primarely on Google Chrome:

https://sharing.clickup.com/clip/p/t9004002740/887461f5-5c4b-46d4-9c97-55060b7f93f3/screen-recording-2025-04-17-11%3A27.webm

On Firefox seems better:
https://sharing.clickup.com/clip/p/t9004002740/1a784982-5a75-40c6-9c6e-29e4a60bc7d5/screen-recording-2025-04-17-11%3A30.webm

Please evaluate with additional tests using different browsers and different OSs.