Select Preset Inspector header background changes size between "None" and "Create New Preset" with no change in content

Steps to reproduce:

1. Open any project.
2. Click on any item in Hierarchy to view in the inspector.
3. Click on the Select Preset (looks like two sliders) icon between the and the ⋮ on any component.
4. On the Select Preset window, ensure the Inspector is toggled on.
5. Click between 'None' and 'Create New...' options. Observe the Inspector.

Actual results: The header size changes between the two, even though no new/different information is displayed.

Expected results: No changes in the UI.

Reproducible with versions: 6000.0.18f1, 2023.2.20f1, 2023.1.20f1

Can’t test with versions: 2021.3.43f1, 2022.3.44f1 - UI is different.

Tested on (OS): Ubuntu 24.04, MacOS Sonoma 14.6.1

Notes:

• Did not regression test extensively as this seems to be new UI not available in older versions, and also a minor cosmetic issue.
  Please contact ticket reporter if you require further testing.