Remaining tabs are not resized when closing tabs

### Windows Terminal version (or Windows build number)

1.8.1032.0

### Other Software

_No response_

### Steps to reproduce

Open a bunch of tabs, close all but a few with the keyboard.

### Expected Behavior

I expect tabs to be restored to their original size when the space allows for it.

### Actual Behavior

Tabs remain compacted indefinitely. The only way to get the tabs back to their expected size seems to be to grab the mouse and hover over the tab bar and then move the mouse off the tab bar again.

Start by reproducing the issue in Windows Terminal 1.8.1032.0: open several tabs, close most with the keyboard, and observe whether the remaining tabs resize. Compare the behavior before and after hovering over and leaving the tab bar; done means the remaining tabs restore their original size whenever space allows.

Written by the indexing model from the issue text.