FIX: allows the selection of the default landing tab

lib/homepage_constraint.rb

@@ -0,0 +1,10 @@
+class HomePageConstraint
+  def initialize(filter)
+    @filter = filter
+  end
+
+  def matches?(request)
+    homepage = request.session[:current_user_id].present? ? SiteSetting.homepage : SiteSetting.anonymous_homepage
+    homepage == @filter
+  end
+end