FreeNAS Code

send email to the admin if a replication has failed

button to clear cache

Fix To address email for test email button

remove tons of unused imports and unused variables

fix config save bug by fixing wildcard import in system views

use freenas admin email as To address in test email

backend to send test mail

GUI for send a test email

remove all @login_required decorators as complement of r5932

use a middleware to set login_required as a default behavior