Currently, when we go to the project sharing and task chatter in the portal view the avatar icon of portal chatter contains more size than the avatar icon size of normal chatter so this commit fixes the issue by applying a CSS property so that the icon has the same size in the portal chatter. task-2720976 X-original-commit: 220565b56493fe13d0c1757da8a0554295ebae19 Part-of: odoo/odoo#90897