made mediatype editor async

src/Umbraco.Web.UI/umbraco/settings/EditMediaType.aspx

@@ -1,6 +1,7 @@
 <%@ Register TagPrefix="cc2" Namespace="umbraco.uicontrols" Assembly="controls" %>
 
 <%@ Page Language="c#" CodeBehind="EditMediaType.aspx.cs" MasterPageFile="../masterpages/umbracoPage.Master"
+    Async="true" AsyncTimeOut="300"
     AutoEventWireup="True" Inherits="umbraco.cms.presentation.settings.EditMediaType" %>
 
 <%@ Register TagPrefix="uc1" TagName="ContentTypeControlNew" Src="../controls/ContentTypeControlNew.ascx" %>

src/Umbraco.Web/umbraco.presentation/umbraco/settings/EditDictionaryItem.aspx.cs

@@ -39,6 +39,7 @@ namespace umbraco.settings
             uicontrols.Pane p = new uicontrols.Pane();
 
 			var save = Panel1.Menu.NewButton();
+            save.Text = ui.Text("save");
             save.Click += save_Click;
 			save.ToolTip = ui.Text("save");
             save.ID = "save";

src/Umbraco.Web/umbraco.presentation/umbraco/settings/EditMediaType.aspx

@@ -1,6 +1,7 @@
 <%@ Register TagPrefix="cc2" Namespace="umbraco.uicontrols" Assembly="controls" %>
 
 <%@ Page Language="c#" CodeBehind="EditMediaType.aspx.cs" MasterPageFile="../masterpages/umbracoPage.Master"
+    Async="true" AsyncTimeOut="300"
     AutoEventWireup="True" Inherits="umbraco.cms.presentation.settings.EditMediaType" %>
 
 <%@ Register TagPrefix="uc1" TagName="ContentTypeControlNew" Src="../controls/ContentTypeControlNew.ascx" %>

src/Umbraco.Web/umbraco.presentation/umbraco/settings/EditMediaType.aspx.designer.cs

@@ -19,6 +19,6 @@ namespace umbraco.cms.presentation.settings {
         /// Auto-generated field.
         /// To modify move field declaration from designer file to code-behind file.
         /// </remarks>
-        protected global::umbraco.controls.ContentTypeControlNew ContentTypeControlNew1;
+        protected global::System.Web.UI.UserControl ContentTypeControlNew1;
     }
 }