List view layout only uses the left part of the screen

[Mer0me]

Steps to reproduce

1. Choose the "list view" layout
2. See the wrong layout

Expected behavior

The list view should use the full width

Actual behavior

The list view only uses the left part of the screen

Mail app version

3.7.8

Mailserver or service

Postfix/Dovecot

Operating system

Debian

PHP engine version

PHP 8.1

Web server

Apache (supported)

Database

MariaDB

Additional info

No response

[ChristophWurst]

Can be closed when the lib is updated