Toggle Last Opened Bottom Panel not working after restoring FileSystem Dock to the side

[Hilderin]

Tested versions

4.3 master

System information

Godot v4.3.beta.mono (42e5b3a) - Windows 10.0.22631 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 3060 (NVIDIA; 31.0.15.3742) - 11th Gen Intel(R) Core(TM) i5-11600KF @ 3.90GHz (12 Threads)

Issue description

When the FileSystem dock is at the bottom and you move it back to the side, pressing Ctrl + J won't toggle the Output panel (which then becomes the first bottom panel on the list). Nothing will happen when pressing Ctrl + J.

cc @Calinou

I already have a fix for that, I'll create a PR soon.

Steps to reproduce

• Move the FileSystem dock at the bottom.
• Move the FileSystem dock back to the side.
• Press the 'Toggle Last Opened Bottom Panel' shortcut (Ctrl + J).
• The Bottom panel disappear and Ctrl + J is not working anymore.

Minimal reproduction project (MRP)

Any project.