Added better handling of record not found and invalid login tokens

app/views/application/404.html.haml

@@ -1,5 +1,9 @@
 = render :partial => 'application/header', :locals => {:image_file => nil}
 = row do
 	= columns(medium: 12) do
-		%p= _'error.404.description', :p
-		= render 'contact', cancel_btn: false, contact_reason: :website
+		- if @token_not_found.present?
+			%p= _'error.404.token_not_found', :p
+			= render 'login', dest: settings_path
+		- else
+			%p= _'error.404.description', :p
+			= render 'contact', cancel_btn: false, contact_reason: :website

app/views/application/user_settings.html.haml

@@ -13,7 +13,6 @@
 						- @conferences.each do | conference |
 							= link_to (_!conference.title), administration_step_path(conference.slug, :edit), class: :button
 
-
 				= form_tag update_settings_path do
 					= textfield :name, current_user.name, required: true, heading: 'articles.conference_registration.headings.name', big: true
 					= checkboxes :languages, User.AVAILABLE_LANGUAGES, current_user.languages || [I18n.locale], 'languages', heading: 'articles.conference_registration.headings.languages'
@@ -23,7 +22,4 @@
 						= button_tag :save, value: :save
 			- else
 				%h2=_'forms.actions.generic.login'
-				= form_tag do_confirm_path, class: 'flex-form' do
-					= emailfield :email, nil, big: true
-					= button_tag :continue, :value => :confirm_email
-					= link_to (_'forms.actions.generic.facebook_sign_in','Facebook Sign In'), auth_at_provider_path(provider: :facebook), class: [:button, :facebook]
+				= render 'login'