Add surveys; custom generated by admins

Available during registration or after conference

Co-authored-by: Shyukri <shshyukriev@suse.com>
Co-authored-by: Henne <hvogel@opensuse.org>
Co-authored-by: Moises <mdeniz@suse.com>

Gemfile

@@ -113,6 +113,8 @@ source 'https://rails-assets.org' do
   gem 'rails-assets-waypoints'
   # for markdown editors
   gem 'rails-assets-bootstrap-markdown'
+  # for select with icon
+  gem 'rails-assets-bootstrap-select'
   gem 'rails-assets-markdown'
   gem 'rails-assets-to-markdown'
 end