Update patch to support single app icons (like simple Minecraft RPC)

I found the large image to be more applicable most of the time as the small image is often only used as an indicator.

Maybe make this a setting?

I also thought about maintaining a list of applications where to use which image but gave up on that idea.

Discord removed the old ones now

We don't want to patch the user modal activity tab for example

Now only the general props are used and the application is fetched for other activities

Prevents crashing when the activities length changes