* Making department field optional during the registration.
* Throwing error if during registration an email already exists.
Removing unused actions.
* Removing dropped field from the ui.
* Adding additional field to the ui.
* Adding "schedules" row to predefined schema.
* Contact form works now properly, if user is logged in the user's email
will be used as sender.
* Fixing navigation to contact form for logged in users.
* Formatting registration email.