Added hidden field, referral code, to first step of registration form

app/views/services/govbox/_hidden_fields_from_step1.html.erb

@@ -1,3 +1,4 @@
 <%= hidden_field_tag :mode, params[:mode], value: params[:mode] || 'sync_mode' %>
+<%= hidden_field_tag :referral_code, params[:referral_code] %>
 <%= hidden_field_tag :legal_subject_name, params[:legal_subject_name] %>
 <%= hidden_field_tag :cin, params[:cin] %>

app/views/services/govbox/_hidden_fields_from_step4.html.erb

@@ -1,4 +1,3 @@
 <%= render 'hidden_fields_from_step3' %>
 <%= hidden_field_tag :password, params[:password] %>
-<%= hidden_field_tag :password_confirmation, params[:password_confirmation] %>
-<%= hidden_field_tag :referral_code, params[:referral_code] %>
+<%= hidden_field_tag :password_confirmation, params[:password_confirmation] %>

app/views/services/govbox/register_step1.html.erb

@@ -49,6 +49,7 @@
         <div class="row">
           <div class="col-md-8 form-group">
             <%= hidden_field_tag :mode, params[:mode], :value => params[:mode] || 'sync_mode' %>
+            <%= hidden_field_tag :referral_code, params[:referral_code], :value => params[:referral_code] || cookies[:ref] %>
             <%= label_tag :legal_subject_name, 'Názov právnickej osoby' %>
             <%= text_field_tag :legal_subject_name, params[:legal_subject_name], class: 'form-control input-lg', required: true, autocomplete: 'off', data: {'slovensko-digital-autoform': 'name'} %>
             <span class="form-text text-muted">Napríklad: Slovensko.Digital, Martinus</span>

app/views/services/govbox/register_step4.html.erb

@@ -1,7 +1,6 @@
 <div class="container">
   <%= form_tag register_step5_services_govbox_index_path do %>
     <%= render 'hidden_fields_from_step3' %>
-    <%= hidden_field_tag :referral_code, cookies[:ref] %>
 
     <div class="row">
       <div class="col-md-6">