Update Umbraco to 7.12.2

WebCms/Umbraco/PartialViewMacros/Templates/ListChildPagesFromChangeableSource.cshtml

@@ -1,3 +1,4 @@
+@using Umbraco.Web
 @inherits Umbraco.Web.Macros.PartialViewMacroPage
 
 @*
@@ -13,20 +14,19 @@
 *@
 
 @{ var startNodeId = Model.MacroParameters["startNodeId"]; }
+
 @if (startNodeId != null)
 {
     @* Get the starting page *@
-    var startNode = Umbraco.Content(startNodeId);
-    var selection = startNode.Children.Where("Visible");
+    var startNode = Umbraco.TypedContent(startNodeId);
+    var selection = startNode.Children.Where(x => x.IsVisible()).ToArray();
 
-    if (selection.Any())
+    if (selection.Length > 0)
     {
         <ul>
             @foreach (var item in selection)
             {
-                <li>
-                    <a href="@item.Url">@item.Name</a>
-                </li>
+                <li><a href="@item.Url">@item.Name</a></li>
             }
         </ul>
     }