erp5_web_renderjs_ui: show timezone even if non-editable mode

IN non-editable mode the timezone was never shown even if the field was configured to display it.

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_datetimefield_js.js

@@ -257,13 +257,6 @@
               offset_time_zone;
             if (gadget.state.value) {
               state_date = new Date(gadget.state.value);
-              if (gadget.state.timezone_style) {
-                text_content = state_date.toLocaleDateString(language);
-                if (!gadget.state.date_only) {
-                  text_content += " " +
-                    formatDateToLocaleFormatString(state_date, language);
-                }
-              } else {
               //get timezone difference between server and local browser
               offset_time_zone = timezone +
                                   (state_date.getTimezoneOffset() / 60);
@@ -275,6 +268,10 @@
                 text_content += " " +
                   formatDateToLocaleFormatString(state_date, language);
               }
+              if (gadget.state.timezone_style) {
+                if (!gadget.state.date_only) {
+                  text_content += " " + ZONE_LIST[timezone + 12][0];
+                }
               }
             }
             p_state.text_content = text_content;

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_datetimefield_js.xml

@@ -228,7 +228,7 @@
                   </item>
                   <item>
                       <key> <string>serial</string> </key>
-                      <value> <string>983.16851.20471.25753</string> </value>
+                      <value> <string>983.56055.11203.16827</string> </value>
                   </item>
                   <item>
                       <key> <string>state</string> </key>
@@ -246,8 +246,8 @@
                           </tuple>
                           <state>
                             <tuple>
-                              <float>1587092369.15</float>
-                              <string>UTC</string>
+                              <float>1589358221.58</float>
+                              <string>GMT+0</string>
                             </tuple>
                           </state>
                         </object>

bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_date_time_field_zuite/testDisplayWithAndWithoutTimeZone.zpt

@@ -83,10 +83,9 @@
 </tr>
 
 <tr>
-  <td>assertElementPresent</td>
-  <!-- Known bug, in non-editable mode the dates are translated to the client timezone as the timezone selector is not shown -->
-  <td>//div[@data-gadget-scope='field_my_stop_date']//div[@data-gadget-scope='field']//p[contains(text(), '7:00')]</td>
-  <td></td>
+  <td>assertText</td>
+  <td>//div[@data-gadget-scope='field_my_stop_date']//div[@data-gadget-scope='field']//p</td>
+  <td>glob:*12:00*GMT+5</td>
 </tr>
 
 <tr>