Themes screen does not load themes that are not installed

[MikeHansenMe]

Currently when you get to the theme selection screen you see this. Only themes that are installed show up.

[georgestephanis]

@lezama Can we pass in preview screenshots and the like so that themes could be installed on demand during Start, for premium themes, generic .org themes, and the like?

[lezama]

@georgestephanis Yes we can.
IMHO I think that it will make the user experience less smoother.
It is possible to set the themes shown on that step with the jetpack_start_themes filter https://github.com/Automattic/jetpack-start/blob/master/steps/select-theme.php#L47.
My suggestion is to have the themes shown on that step preinstalled if possible.

[MikeHansenMe]

Small addition. Users can view the preview since that is just a link but if they then select a theme based on the preview they get a whitescreen on the frontend because the theme does not exist.

[georgestephanis]

Yes, sorry, I had figured for non-installed themes, it would link to an external demo site. Like https://twentythirteendemo.wordpress.com or the like.