[Feature request] add theme preview on top screen

[cooolgamer]

Add the theme preview in small on the top screen like Themely already have, I find that really useful so you don't have to press Y to check the preview

[Helloman892]

We considered this a long time ago, but the problem we had with it was fitting everything on the screen whilst also making all of the command instructions accessible. If this gets any support from others, we might consider putting it in -- do consider though that this project has been effectively defunct for large features (i.e. those that require a lot of work) over a year now.