Correct the Nested Content Editor directive name,

as it conflicted with the package version - which override the core version (wasn't good).

src/Umbraco.Web.UI.Client/src/common/directives/components/umbnestedcontent.directive.js

@@ -1,4 +1,4 @@
-angular.module("umbraco.directives").directive('nestedContentEditor', [
+angular.module("umbraco.directives").directive('umbNestedContentEditor', [
 
     function () {
 

src/Umbraco.Web.UI.Client/src/views/propertyeditors/nestedcontent/nestedcontent.html

@@ -26,7 +26,7 @@
                 </div>
 
                 <div class="nested-content__content" ng-if="$parent.realCurrentNode.key == node.key && !$parent.sorting">
-                    <nested-content-editor ng-model="node" tab-alias="ncTabAlias" />
+                    <umb-nested-content-editor ng-model="node" tab-alias="ncTabAlias" />
                 </div>
             </div>