A blank narrow section becomes visible on the right side of the "Searches" section on max view

Steps to reproduce:

1. Create a new Unity project
2. Go to the "Search" window
3. Enter some string and save the results
4. Open the "Searches" section
5. Expand it to the max

Actual results: An additional blank section on the right side of the "Searches" section becomes visible. A screenshot is added below in the "Attachments" section.

Expected results: No blank section.

Reproducible with versions: 2023.1.0a15, 6000.0.46f1, 6000.1.0f1, 6000.2.0a9

Not reproducible with versions: 2022.3.61f1, 2023.1.0a14

Can’t test with versions: -

Tested on (OS):  M1 Max - Sequoia 15.3.2