MoveFocusOrTab does not switch tab when a pane is in fullscreen

[eproxus]

Issue description

When having two tabs, with the first having two panes of which one is in fullscreen, pressing Alt→ does not move to the second tab.

The following keybinding from the default bindings:

    shared_except "locked" {
		// ...
        bind "Alt h" "Alt Left" { MoveFocusOrTab "Left"; }
        bind "Alt l" "Alt Right" { MoveFocusOrTab "Right"; }
        // ...
    }

seems to not work when a pane is in fullscreen, even though there is another tab to switch to. Going to fullscreen does not automatically enter locked mode so I had the expectation that this would work.

Minimal reproduction

1. Create two tabs
2. In the first tab, create two panes
3. Make the first pane fullscreen
4. Press Alt+Right
   • Expected: The second tab is focused
   • Actual: nothing happens

Other relevant information

Zellij: 0.40.1