Volume component’s “Add Override” dropdown is extremely small when opened

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Select the "Global Volume" GameObject in the Hierarchy window
3. Click the "Add Override" button in the Inspector window
4. Click "Post-Processing"
5. Observe the "Add Override" dropdown

Actual results: The dropdown is extremely small with only one element visible at a time

Expected results: The dropdown is bigger so that more elements are visible in it

Reproducible with versions: 6000.5.0a1

Not reproducible with versions: 6000.0.62f1, 6000.2.12f1, 6000.3.0b10, 6000.4.0a3, 6000.4.0a4

Tested on (OS): Windows 11, MacOS Silicon Sequoia 15.6.1