Physical Keycode and Key Label options appear grayed out in the input editor when editing an existing key

[Calinou]

Godot version

4.0.2.stable

System information

Fedora 37, GeForce RTX 4090 (NVIDIA 530.41.03)

Issue description

Physical Keycode and Key Label options appear grayed out in the input editor when editing an existing key, even though I should logically be able to change it:

If I set the key to another key then change it back, then the Physical Keycode and Key Label options are no longer grayed out.

cc @bruvzg

Steps to reproduce

• Open the Project Settings > Input Map tab.
• Create an action, with an associated key. Save it.
• Click the edit button next to the key, and try to change the type without touching the actual key's value.
• Change the key's value back and forth and try to change the type using the dropdown again.

Minimal reproduction project

N/A

[bruvzg]

Input map save only one value, and it's not always possible to convert one type of keycode to another (at least for Unicode → other), but I guess for the cases conversion is possible it should be available.