Updated seminar sections
Added active option to url helpers
Changed nav item active condition
Changed form styling
Improved seminar form
Renamed user display_name method to full_name
Fixed typo in validation
Added missing authorisation config
Fixed login section
Added provider
Updated utilitary seminar button
Fixed info messages in seminar form
Refactor header search form
Added option to hide subtitle
Added subtitle to seminar partial
Increased upcoming seminar count
Added dashboard
Added header quick links spacing
Added become user helper action
Fixed showing provider when nil