FR : allow the admin to set different display for "all" and "mine" river

[dranii]

When we see the site activity tab - All Site Activity - it is okay to see multiple thumbnails in a single entry in river so that one user is not too much "polluting" the river.
However in the activity stream of the individual users (except the activity widget which has a narrow and small display) bigger thumbnails and single photo per entry may be set optionally. This will help users who are mainly using photo and mainly wants a photo-stream.

Since this plugin is all about photo and images, it will be really good to have this usability.

[iionly]

One river entry is one river entry. It's created at the time of the upload and can't be different on different tabs of the activity river. That's how it is on Elgg.