On review feedback, I had changed the mode selector rendering to use Spina's `renderInto()` method. This was not passing the correct element to render into, but I didn't notice, because `renderInto()` had a bug that prevented the menu from rendering at all. This change also adds an extra call to `#update()` when we render, just to ensure that it will always have the correct data. Testing Done: Used the banner and once again saw the mode selector menu.