Feature 78649336 - web interface for mailer
configure privileged users in Settings
rip scaffold comments
care for validation, @yggie: thx for the validation-hint,  @sampritpanda: elegant
use CONSTANTS
DRY - thx @sampritipanda
not required - thx @sampritpanda
fix - thx @tochman && @sampritipanda
 check for a privileged user @yggie
spec sending expected emails per chunk - @yaggi
move link to sidebar
additional \b
html email boilerplate
Merge pull request #573 from erpe/features/78649336_web_interface_mailer

Feature PT: 78649336 - web interface for mailer