cannot resize the controlbox

[joudinet]

Describe the bug
When trying to resize the controlbox in both fullscreen and embedded view_mode, nothing happen. I do see the cursor changing to w-resize but the resizing doesn't work. On the contrary, resizing the participant list works.

To Reproduce
Steps to reproduce the behavior:

1. Set view_mode to either fullscreen or embedded.
2. Log in and try to resize the control box horizontally.

Expected behavior
The control box width should adapt to the resizing movement.

Environment (please complete the following information):

• Desktop
• Browser Firefox 132
• Converse.js version 10.1.7

Additional context
I've also tested it on converse.js master version and the same issue appears.