Physics Debugger displays mouse cursor ray casts when Game view is not open if Input System package is used

Steps to reproduce:

1. Open the attached project
2. Open the Physics Debugger window
3. Enter Play mode
4. Switch to Scene view (Or close the Game view)
5. Move the cursor around the screen

Actual results: Physics Debugger displays mouse cursor ray casts even though Game view isn't active

Expected results: Physics Debugger does not display mouse cursor ray casts if the Game view isn't active

Reproducible with versions: 1.14.2/1.19.0 (6000.0.75f1, 6000.3.15f1, 6000.4.7f1, 6000.5.0b9, 6000.6.0a5)

Tested on (OS): Ubuntu 22, macOS 26.4.1

Notes:

• The issue does not occur if the Input Manager is used