Bug 477337

Created attachment 163345 [details]
Mockup of new icons

When using Linux on less common form factors (tablets, touch screens, Home Theater setups), usually there is no way to know if an app is going to be usable until you install and run it. For example, you have no idea if an app will respond to touch inputs properly, or if a game will work well with a gamepad.

However, it has come to my attention that the Appstream specification allows apps to list what <control/>s they support. see here:
https://freedesktop.org/software/appstream/docs/chap-Metadata.html

When viewing an app in Discover, would it be possible to add icons to indicate what forms of input this app supports? 
Screenshot attached as a rough mockup of what I'm thinking.

If this is an acceptable idea, I am willing to take an honest stab at implementing this myself in a pull request. However, I am a web developer, with barely any c++ experience. I would likely need guidance.