Items played using preview/postcard functions do not update current item information

[GuySie]

While using the postcard/preview function to temporarily play images on the Canvas, the currently played item information is not updated. This is by design in the Canvas, as the preview function is a temporary override that will automatically disappear - the currently played item is still playing, it's just showing something else right now.

However, this may be confusing for users for whom the HA interface offers no difference between playing or previewing images.

[GuySie]

Theoretically we could override the current item information when we call the code to preview an image, but we don't know when the Canvas stops previewing. Displaying the preview image data when the preview has ended and we've gone back to the 'normal' item would be just as confusing.