Fixes csrf issue

Conflicts:
	src/Umbraco.Web.UI/config/ClientDependency.config
	src/Umbraco.Web.UI/umbraco/logout.aspx
	src/Umbraco.Web.UI/umbraco/umbraco.aspx
	src/Umbraco.Web/umbraco.presentation/install/LegacyClasses.cs
	src/Umbraco.Web/umbraco.presentation/umbraco/logout.aspx.cs