Display a notice if cookies aren't enabled. Fixes #1280.

Conflicts:
	app/view/js/modernizr.custom.2.8.2.js
Dashboard activity log permission check #1247
cherry-picking 500939556be4e2b
Tweaking 'activitylog' permission. See #1302
Tweaking permissions for file-uploads.
small changes to visitors extension
added template for showvisitorsprofile