Separate rich install screenshots for mobile and desktop

[FormularSumo]

Currently Elk does not provide separate mobile and desktop screenshots. The current screenshots are desktop ones which don't have a form factor set, which creates two problems:

• On desktop, there's no rich install UI at all
• On mobile, the rich install UI shows desktop screenshots whereas it'd be more appropriate to use mobile screenshots

Current Elk install prompt on Desktop:

Sqoosh rich install prompt on Desktop (has desktop form factor set for desktop screenshots)

Current Elk rich install prompt on Android:

Pinafore rich install prompt on Android (mobile form factor screenshots set):

You can also set tablet screenshots, although this is less important as they're fairly similar to desktop screenshots.

[FormularSumo]

I've just realised that not having desktop form factor screenshots set means that there's rich install on desktop at all (I hadn't tried before), so updated the title and my original message.