Plugin breaks Menu item-type in Appearance > Menu

When adding post or page menu items to the menu, the item-type field should show Post or Page.
When Classic Editor plugin is enabled, the item-type field shows Classic editor or Block editor instead.

This is both useless information on the Menu page – the type of editor used is not important. And it obfuscates relevant information – what type of menu item it actually is – post or page.

Also item-type should use title-casing. But that last point should become moot once this is fixed.