Merge branch '7.2.1' of https://github.com/markusdrake/Umbraco-CMS into dev-v7

src/Umbraco.Web.UI.Client/src/common/directives/util/fixnumber.directive.js

@@ -24,6 +24,7 @@ function fixNumber($parse) {
 
             //always return an int to the model
             ctrl.$parsers.push(function (value) {
+            	if (value === 0) return 0;
                 return parseFloat(value || '', 10);
             });
 

src/Umbraco.Web.UI.Client/src/common/services/tinymce.service.js

@@ -111,7 +111,7 @@ function tinyMceService(dialogService, $log, imageHelper, $http, $timeout, macro
                                 if (img) {
 
                                     var data = {
-                                        alt: img.altText,
+                                        alt: img.altText || "",
                                         src: (img.url) ? img.url : "nothing.jpg",
                                         rel: img.id,
                                         id: '__mcenew'