First pass at HTML conversion from Master/Slave to Primary/Secondary (TODO: Backend)
Start work on migrating admin_auth_settings to Bootstrap v4
admin_setting_basic -> Change plain text for On/Off to toggles in current state, and changed "Action" column to the opposite toggle of current setting
dashboard_domain -> Reduce deuplicate code for the new dropdown-menu for Actions
register -> Add exclamation icon in front of error text
template_add -> changed box-body to card-body
user_profile -> Fixed tab naviation for Bootstrap v4. Tabs also fade between changes
Added server-side logic for register.html validation
Keep form firelds on register.html in the event of wrong input fields to save users from retyping info
More button rounding
Convert col-xs-* to just col-* as part of bootstrap v3 -> v4
Convert box-* -> card-* as part of bootstrap v3 -> v4
Moved domain actions on main dashboard to a dropdown menu to avoid clutter
Added "Log Out" to top header left
Hid OTP on admin edit user to only show the disable card & options if the user account has OTP enabled
When enabled, forbids the creation of a domain if it exists as a record in one of its parent domains (administrators and operators are not limited though).
