Fix ReCaptha NPE

Improve error handling when permission are removed.

mindplot/src/main/javascript/RestPersistenceManager.js

@@ -45,7 +45,8 @@ mindplot.RESTPersistenceManager = new Class({
                     events.onError();
                 },
                 onFailure:function (xhr) {
-                    events.onError();
+                    var responseText = xhr.responseText;
+                    events.onError(JSON.decode(responseText));
                 },
                 headers:{"Content-Type":"application/json", "Accept":"application/json"},
                 emulation:false,
@@ -60,7 +61,6 @@ mindplot.RESTPersistenceManager = new Class({
                 async:false,
                 method:'post',
                 onSuccess:function () {
-                    console.log("Revert success ....");
                 },
                 onException:function () {
                 },

mindplot/src/main/javascript/widget/IMenu.js

@@ -78,10 +78,14 @@ mindplot.widget.IMenu = new Class({
                 }
                 menu.setRequireChange(false);
             },
-            onError:function () {
+            onError:function (error) {
                 if (saveHistory) {
                     saveElem.setStyle('cursor', 'pointer');
-                    $notify($msg('SAVE_COULD_NOT_BE_COMPLETED'));
+                    var msg = error ? error.globalErrors : null;
+                    if (!msg) {
+                        msg = $msg('SAVE_COULD_NOT_BE_COMPLETED');
+                    }
+                    $notify(msg);
                 }
             }
         });