erp5_web_renderjs_ui: make sure that an object's _links.view is an array

It may not be the case if there is only one view, as defined by the hateoas spec

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_page_form_js.js

-/*global window, document, rJS, URI, RSVP, jIO, Blob, URL, asBoolean */
+/*global window, document, rJS, URI, RSVP, jIO, Blob, URL, asBoolean, ensureArray */
 /*jslint nomen: true, indent: 2, maxerr: 3 */
 /**
 Page Form is a top-level gadget (a "Page") taking care of rendering form
 and handling data send&receive.
 */
-(function (window, document, rJS, URI, RSVP, jIO, Blob, URL, asBoolean) {
+(function (window, document, rJS, URI, RSVP, jIO, Blob, URL, asBoolean, ensureArray) {
   "use strict";
 
   /*jslint regexp: true*/
@@ -233,7 +233,7 @@ and handling data send&receive.
                 .push(function (result2) {
                   return gadget.redirect({command: 'display_with_history', options: {
                     jio_key: options.jio_key,
-                    view: result2._links.view[0].href
+                    view: ensureArray(result2._links.view)[0].href
                   }});
                 });
             }
@@ -656,4 +656,4 @@ and handling data send&receive.
     });
 
 
-}(window, document, rJS, URI, RSVP, jIO, Blob, URL, asBoolean));
\ No newline at end of file
+}(window, document, rJS, URI, RSVP, jIO, Blob, URL, asBoolean, ensureArray));
\ No newline at end of file

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_page_form_js.xml

@@ -234,7 +234,7 @@
                   </item>
                   <item>
                       <key> <string>serial</string> </key>
-                      <value> <string>980.19453.2043.40055</string> </value>
+                      <value> <string>983.16778.9416.38758</string> </value>
                   </item>
                   <item>
                       <key> <string>state</string> </key>
@@ -252,7 +252,7 @@
                           </tuple>
                           <state>
                             <tuple>
-                              <float>1575625017.2</float>
+                              <float>1587089012.07</float>
                               <string>UTC</string>
                             </tuple>
                           </state>