[FIX] web: debugmanager view metadata should not crash

In general, I think that we can safely consider that crashes are not the
intended behaviour.

In this case, viewing metadata crashed because we tried to format a date
which was not parsed (so, a string), instead of a moment object. We
simply just parse the date before, and it works as intended.

addons/web/static/src/js/widgets/debug_manager.js

@@ -327,15 +327,21 @@ DebugManager.include({
         var ds = this._view_manager.dataset;
         if (!this._active_view.controller.getSelectedIds().length) {
             console.warn(_t("No metadata available"));
-            return
+            return;
         }
         ds.call('get_metadata', [this._active_view.controller.getSelectedIds()]).done(function(result) {
+            var metadata = result[0];
+            metadata.creator = field_utils.format.many2one(metadata.create_uid);
+            metadata.lastModifiedBy = field_utils.format.many2one(metadata.write_uid);
+            var createDate = field_utils.parse.datetime(metadata.create_date);
+            metadata.create_date = field_utils.format.datetime(createDate);
+            var modificationDate = field_utils.parse.datetime(metadata.write_date);
+            metadata.write_date = field_utils.format.datetime(modificationDate);
             new Dialog(this, {
                 title: _.str.sprintf(_t("Metadata (%s)"), ds.model),
                 size: 'medium',
                 $content: QWeb.render('WebClient.DebugViewLog', {
-                    perm : result[0],
-                    format : field_utils.format
+                    perm : metadata,
                 })
             }).open();
         });

addons/web/static/src/xml/base.xml

@@ -176,19 +176,19 @@
         </tr>
         <tr>
             <th>Creation User:</th>
-            <td><t t-esc="format.many2one(perm.create_uid, { 'type' : 'many2one' }, '/')"/></td>
+            <td><t t-esc="perm.creator"/></td>
         </tr>
         <tr>
             <th>Creation Date:</th>
-            <td><t t-esc="format.datetime(perm.create_date, { 'type' : 'datetime' }, '/')"/></td>
+            <td><t t-esc="perm.create_date"/></td>
         </tr>
         <tr>
             <th>Latest Modification by:</th>
-            <td><t t-esc="format.many2one(perm.write_uid, { 'type' : 'many2one' }, '/')"/></td>
+            <td><t t-esc="perm.lastModifiedBy"/></td>
         </tr>
         <tr>
             <th>Latest Modification Date:</th>
-            <td><t t-esc="format.datetime(perm.write_date, { 'type' : 'datetime' }, '/')"/></td>
+            <td><t t-esc="perm.write_date"/></td>
         </tr>
     </table>
 </t>