Hierarchy V2 window has a horizontal scrollbar which doesn’t disappear even when making the window larger or fullscreen when a new project is created

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Enable Hierarchy V2 (Unity > Settings > General > Use new Hierarchy window)
3. Observe the Hierarchy V2 window

Actual results: There is a horizontal scrollbar which doesn’t disappear even when making the window larger or fullscreen

Expected results: There is no horizontal scrollbar since all the elements fit in the window on a new project

Reproducible with versions: 6000.3.0b4, 6000.4.0a1

Tested on (OS): MacOS Silicon Sequoia 15.6.1

Notes:

• Maybe the “Resize to Fit” functionality should be called when a new project is created since it seems a bit odd to have a horizontal scrollbar when there are no GameObjects with long names and everything fits in the Hierarchy V2 window on a new project