string concatenation with translations is bad, especially if you leave on part of it untranslated :P

This reverts commit 3af5e24a.

Conflicts:

	app/controllers/aspects_controller.rb

use explicit check in User#disconnect_everyone, the previous check failed in rarly weired situations, I can't tell why

let the user upload an image without touching the textarea, improved check in Photo#process to not yield no method on nil error in some cases