Fix static data and backward compatibility

app/views/admin/communication/blocks/templates/partners/_edit.html.erb

 <a  class="<%= button_classes('mb-4 me-1') %>"
-    v-on:click="data.elements.push({name: '', url: '', logo: {}})">
+    v-on:click="data.elements.push({id:'', name: '', url: '', logo: {}})">
     <%= t '.add_partner' %>
 </a>
 <draggable :list="data.elements" class="list-group" handle=".partnerHandle">
@@ -16,7 +16,7 @@
             <select :id="'organization-' + index + '-id'"
                     class="form-select select"
                     v-model="partner.id">
-              <option value="" :selected="!partner.id"><%= t '.unregistered_organization' %></option>
+              <option value="" :selected="true"><%= t '.unregistered_organization' %></option>
               <% current_university.organizations.ordered.each_with_index do |organization, index| %>
                 <option value="<%= organization.id %>"><%= organization.name %></option>
               <% end %>

app/views/admin/communication/blocks/templates/partners/_static.html.erb

 <% if block.data.has_key?('elements') %>
-<% block.data['elements'].each do |partner| %>
-      <% if partner['type'] == 'organization' %>
-      <% organization = block.university.organizations.find partner['id'] %>
-      <% if organization %>
-      - is_organization: true
-        id: <%= partner['id'] %>
+<% block.data['elements'].each do |partner|
+      id = partner['id']
+      if id != ''
+        unless id.nil?
+        unless id.empty?
+          organization = block.university.organizations.find id %>
+      - id: "<%= id %>"
         name: >
           <%= prepare_text_for_static organization.name %>
-        <% if organization.url %>
-        url: >-
-          <%= prepare_text_for_static organization.url %>
-        <% end %>
+        url: <%= prepare_text_for_static organization.url %>
         <% if organization.logo.attached? %>
         logo: "<%= organization.logo.blob.id %>"
         <% end %>
-      <% end %>
-      <% else %>
+        <% end
+        end 
+      else %>
       - name: >
           <%= prepare_text_for_static partner['name'] %>
         url: >-
@@ -23,4 +22,4 @@
         logo: "<%= prepare_media_for_static partner, 'logo' %>"
       <% end %>
 <% end %>
-<% end %>
+<% end %>
\ No newline at end of file