Invalid selection after deleting the last entry in the Action Map list in the Input Actions Editor

Steps to reproduce:

1. Create a new project via Unity Hub (e.g. Universal 2D)
2. Create a new Input Actions asset with 3 or more Action Maps (Assets > Create > Input Actions)
3. Click the last Action Map to select it
4. delete it (using the keyboard)
5. Observe the next Action Map becomes selected automatically
6. Press Delete, Ctrl+D, or any Arrow Keys

Actual results: The auto-selected Action Map is highlighted, but all keyboard shortcuts in the editor (Delete, Ctrl+D duplicate, etc.) do nothing. Keyboard input to the Input Editor stays disabled until you click on another Action Map

Expected results: After a keyboard delete, keyboard focus stays on the Action Maps list so the auto-selected map immediately accepts shortcuts, with no extra click needed.

Reproducible with versions: 1.8.2, 1.19.0 (6000.0.0f1, 6000.0.79f1, 6000.3.20f1, 6000.5.4f1, 6000.6.0b4, 6000.7.0a2)

Tested on (OS): Windows 11