More improvements to registration, leaf input create, and charting

WebCms/Views/Partials/MainNavigation.cshtml

@@ -2,6 +2,7 @@
 @{
     var home = CurrentPage.Site(); 
     var loginStatus = Members.GetCurrentLoginStatus();
+    var admin = Members.IsMemberAuthorized(allowGroups: new List<string>{"Administrator"});
 }
 
 @if (home.Children.Any())
@@ -40,7 +41,7 @@
         </ul>
         <div class="navbar-text text-light text-left">
             @Html.Partial("LoginStatus")
-            @if (loginStatus.IsLoggedIn)
+            @if (loginStatus.IsLoggedIn && admin)
             {
                 <div class="align-items-center">
                     <a href="~/umbraco#"><span class="fa fa-cog"></span> Site Editor</a>