images and files field fix on copy and update

Author: Christian Blanquera

src/Model/template/format/field.html

@@ -445,7 +445,7 @@
         </tfoot>
     </table>
 {{/when}}
-{{#when config.type '===' 'files'}}
+{{#when config.type '===' 'filelist'}}
     <table
         class="table table-striped file-field"
         data-do="file-field"
@@ -487,7 +487,7 @@
                         </td>
                         <td class="file-field-name">
                             {{this}}
-                            <input name="{{../@key}}" type="hidden" value="{{this}}" />
+                            <input name="{{../@key}}[]" type="hidden" value="{{this}}" />
                         </td>
                         <td class="file-field-actions">
                             <a class="text-info file-field-move-up" href="javascript:void(0)">
@@ -634,17 +634,17 @@
                         </td>
                         <td class="file-field-name">
                             {{this}}
-                            <input name="{{../@key}}" type="hidden" value="{{this}}" />
+                            <input name="{{../@key}}[]" type="hidden" value="{{this}}" />
                         </td>
                         <td class="file-field-actions">
                             <a class="text-info file-field-move-up" href="javascript:void(0)">
                                 <i class="fas fa-arrow-up"></i>
                             </a>
-                            &nbsp;&nbsp;&nbsp;'
+                            &nbsp;&nbsp;&nbsp;
                             <a class="text-info file-field-move-down" href="javascript:void(0)">
                                 <i class="fas fa-arrow-down"></i>
                             </a>
-                            &nbsp;&nbsp;&nbsp;'
+                            &nbsp;&nbsp;&nbsp;
                             <a class="btn btn-danger file-field-remove" href="javascript:void(0)">
                                 <i class="fas fa-times"></i>
                             </a>