[Issue] Label attribute doesn't work for non-serialized fields and properties

[martin-braun]

Hi,

it would be great if the ShowNativeProperty would allow a string argument to change its visual appearance in the editor, similar to buttons, like so:

[ShowNativeProperty("My Property")]
public string MyProperty { get; set; }

[CharlieReece]

Same for ShowNonSerializedField.

    [ShowNonSerializedField, Label("Ammo Left")]
    private int ammoLeft;