Issue description

When I create a new tab, I can see that the tab bar is flickering.

As I understand, Zellij loads and initializes the tab plugin every time a new tab is created, and that causes the flickering. For a brief moment when plugin is being loaded, Zellij shows a loading indicator, which shows:

Cloning for other clients ... SUCCESS

I recorded a video:

For a very brief moment (one frame in video) I can see:

Here's a similar issue with zjstatus plugin: #3082

Can we do something to make it not flicker or at least to be less visible?

1. I think if we don't show a loading indicator (as @imsnif suggested in Flash of text when creating tabs with a status bar plugin #3082) it would already look slightly better.
2. Would it be possible to keep the old content of a pane until plugin is initialized and only then make the redraw?

Minimal reproduction

I use default config with very small changes:

166c166
<         bind "Ctrl b" { SwitchToMode "tmux"; }
---
>         bind "Alt a" { SwitchToMode "tmux"; }
235a236
>         bind "x" { CloseTab; SwitchToMode "normal"; }
330c331
< // pane_frames false
---
> pane_frames false

zellij 0.43.1

Other relevant information

I use Ghostty on M2 Max macbook.