Issue #2972308 by Berdir, mbovan, johnwebdev, jpatel657, benjifisher, plach, xjm, jigarius, geek-merlin: Allow users to translate content they can edit

Issue #576296 by no_angel, joachim, dagmar, jhodgdon, coderintherye, yoroy, xjm: Remove redundant description for some permissions

Issue #2328411 by dawehner, geerlingguy, herom: Convert all permissions to yml files and permission callbacks.