if KeybindList is unbound when the menu is opened, KeybindListEditor does not display its EmptyText property

[pneuma163]

Example sml:

<frame layout="256px 256px"
        padding="16"
        background={@Mods/StardewUI/Sprites/ControlBorder} >
    <keybind-editor button-height="64"
            sprite-map={@Mods/StardewUI/SpriteMaps/Buttons:default-default-0.5}
            editable-type="MultipleKeybinds"
            add-button-text="Add"
            empty-text="Not set"
            focusable="true"
            keybind-list={<>OpenMenuKeybinds} />
</frame>

In the above example, OpenMenuKeybinds gets set in the model to a value from the ModConfig. That value has a default, but the player can set it to none.

When the menu is opened, if the keybind is bound and then that binding is removed within the menu, then the EmptyText property displays in the menu (top example in the image). However if the menu is opened and the keybind is not bound, then the graphic of the KeybindListEditor is displayed with neither button nor EmptyText (bottom example in the image)