The equality operator is used to determine whether the next background
in the cycle should be loaded, to avoid pointless loads of the same
background several times (see #13362 and #13393). Its omission in the
latter pull caused seasonal backgrounds to no longer cycle.
Closes#13508.
- Replace the sprite with a solid black box when a storyboard requests it.
- Create a new storyboard instance and exclude the fail layer as well as strip all samples from it
- Do not attempt in creating the storyboard when it isn't needed
This avoids loading the sprite if its not needed and instead of hiding it, it is removed when the storyboard replaces the background or there is a video.
This also only initializes DrawableStoryboard if there are any elements in any layer.