Fixes #202455

For testing:

1. Open the keybindings editor
2. Close the keybindings editor
3. Repeat a opening and closing the keybindings editor a few times
4. The total event listener count should increment at the start, but then should stop incrementing (on my computer it grows from 968 to 1740 but stops at 1740 event listeners)

Test output

{
  "eventListenerCount": {
    "before": 1740,
    "after": 1740
  },
  "isLeak": false
}