MDL-71022 gradereport_history: prevent double escaping of users.

The user identity fields are already escaped by the AJAX endpoint
that returns them, we don't need to do it again at the client.

grade/report/history/yui/build/moodle-gradereport_history-userselector/moodle-gradereport_history-userselector-debug.js

@@ -397,7 +397,7 @@ Y.namespace('M.gradereport_history').UserSelector = Y.extend(USERSELECTOR, M.cor
                         '<div class="{{CSS.FULLNAME}}">' +
                             '<label for="{{checkboxId}}">{{fullname}}</label>' +
                         '</div>' +
-                        '<div id="{{extraFieldsId}}" class="{{CSS.EXTRAFIELDS}}">{{extrafields}}</div>' +
+                        '<div id="{{extraFieldsId}}" class="{{CSS.EXTRAFIELDS}}">{{{extrafields}}}</div>' +
                     '</div>' +
                 '</div>'
             );

grade/report/history/yui/build/moodle-gradereport_history-userselector/moodle-gradereport_history-userselector.js

@@ -397,7 +397,7 @@ Y.namespace('M.gradereport_history').UserSelector = Y.extend(USERSELECTOR, M.cor
                         '<div class="{{CSS.FULLNAME}}">' +
                             '<label for="{{checkboxId}}">{{fullname}}</label>' +
                         '</div>' +
-                        '<div id="{{extraFieldsId}}" class="{{CSS.EXTRAFIELDS}}">{{extrafields}}</div>' +
+                        '<div id="{{extraFieldsId}}" class="{{CSS.EXTRAFIELDS}}">{{{extrafields}}}</div>' +
                     '</div>' +
                 '</div>'
             );

grade/report/history/yui/src/userselector/js/userselector.js

@@ -395,7 +395,7 @@ Y.namespace('M.gradereport_history').UserSelector = Y.extend(USERSELECTOR, M.cor
                         '<div class="{{CSS.FULLNAME}}">' +
                             '<label for="{{checkboxId}}">{{fullname}}</label>' +
                         '</div>' +
-                        '<div id="{{extraFieldsId}}" class="{{CSS.EXTRAFIELDS}}">{{extrafields}}</div>' +
+                        '<div id="{{extraFieldsId}}" class="{{CSS.EXTRAFIELDS}}">{{{extrafields}}}</div>' +
                     '</div>' +
                 '</div>'
             );