How to reproduce:

1. Create any Project
2. In the Project Browser click the "Open in Search" button
3. Observe the Search field
4. Click the "Open in Search" button again and observe the Search field and the Second Search Window

Actual results:

On 2022.3 LTS, a second Search Window is opened

On Unity 6, a second Search Window is opened
The Search field is populated with the string ": p", the second opened Search Window shows Error "Unknown filter "p"."
The string in the Search Field isn't deleted when closing a single Window, but if a Search Window is already opened and you open another one, a second ": p" string is entered, and if the user then closes both of those Windows, only the second ": p" string is deleted from the Search field

Expected results:

Previously, no second Search Window was opened if there was one already opened, but this might be a design change?

The Search field shouldn't be populated with a ": p" string as this breaks opening multiple Search Windows from the Project Browser (This only happens on Unity 6)

Reproducible with versions: 2022.3.38f1, 2022.3.45f1, 6000.0.11f1, 6000.0.18f1

Not reproducible with versions: 2021.3.38f1, 2022.3.37f1, 6000.0.10f1

Tested on (OS): Windows 11, macOS Sonoma M1