increase QrCode size; remove serial number from blank contract

app/views/blank_contracts/pdf.html.erb

@@ -2,6 +2,10 @@
   <div class="page">
     <% has_logo = local_assigns[:logo] %>
     <table class="heading-table">
+      <tr>
+        <td>&nbsp;</td>
+        <td class="do-not-copy-warning"><strong><%= t '.do_not_copy_warning' %></strong></td>
+      </tr>
       <tr>
         <td>
           <% if has_logo %>
@@ -11,17 +15,9 @@
           <% end %>
         </td>
         <td>
-          <img src="<%= qr_codes[copy_index] %>" />
+          <img class="qr-code" src="<%= qr_codes[copy_index] %>" />
         </td>
       </tr>
-      <tr>
-        <td>&nbsp;</td>
-        <td class="serial-number"><%= serial_numbers[copy_index] %></td>
-      </tr>
-      <tr>
-        <td>&nbsp;</td>
-        <td><strong><%= t '.do_not_copy_warning' %></strong></td>
-      </tr>
     </table>
     <hr>
     <% if contract_template.body.present? %>