New zellij 0.45.1 nested sessions breaks the old way of doing nested sessions

2. Issues with the Zellij UI / behavior / crash

Before I had v0.44.3 configured to have ctrl+alt to use the outer session and ctrl, alt seperatly in the inner session, worked perfectly. Now I have v0.45.1 and that does not work at all. I set nested_session_handling "never" But that now does not highlight the inner session tabs that are active. It does not show the inner sessions status / command line at the bottom, and it shows a Decend: <unbound>. And the way the tabs are they kind of bleed into each other, before there was a bit of a gap between them.

The new itegrated accend and decend is completely unusable compared to that older setup.

Allow using the older setup or the newer setup so we can choose which one we want.