Cannot create custom keyboard shortcuts

### What Happened?

When trying to "Add Shortcut" under the "Custom" tab, an entry is added that is disabled. However, it cannot be assigned to a keyboard shortcut, "Set New Shortcut" closes the pop-up menu without allowing me to set the shortcut.

### Steps to Reproduce

1. Navigate to Custom tab,
2. "Add Shortcut" for any application in the selection menu or a custom command,
3. Click "Set New Shortcut" to try and set the shortcut.

### Expected Behavior

The text "Enter New Shortcut..." should appear and allow me to enter the desired shortcut, like under the existing entries on the other tabs. The text doesn't appear.

### OS Version

8.x (Circe)

### Session Type

Classic Session (X11, This is the default)

### Software Version

Latest release (I have run all updates)

### Log Output

```shell
No logs are produced.
```

### Hardware Info

Framework Laptop 13