Nested tabs become unnested if the parrent is dragged to child tab

[gaderic]

Before submitting a bug report

• I updated to the latest version of Multi-Account Container and tested if I can reproduce the issue
• I searched for existing reports to see if it hasn't already been reported

Step to reproduce

1. Create two tabs.
2. Nest tab 2 under tab 1.
3. Create a third tab and nest tab 1 under tab 3.
4. Drag any parent tab in the current tree to any of their child tabs.

Actual behavior

The entire tree nested under the selected the parent tab becomes unnested.

Expected behavior

Nothing or the top child under the parent tab being moved should become the new parent tab.

Additional informations

I can only reproduce this bug after a tree is nested to separate tab not in the tree. It does not work if I simply create new tabs and add them to an existing tree and try to move any of the parent tabs in that tree to a child tab.

Provide a copy of Troubleshooting Information page (optional)

No response