CloseTab + MoveTab issues

[MyApaulogies]

2. Issues with the Zellij UI / behavior / crash

Issue description

Closing a tab (via CloseTab or otherwise) causes MoveTab to not work properly.

To reproduce

Create 7 tabs, then close the any but the last. Choose a tab, then spam MoveTab "Left" and MoveTab "Right". Repeat with any other tabs. Note how you can't move a tab to the leftmost slot, and there's a kind of barrier that you can't cross over where the closed tab used to be.

Minimal reproduction

Create 2 tabs, then close the first. Make some new tabs, then try to move them around.

Other relevant information

Using Alacritty, Zellij 0.40.0