Fix error page url resolution.

Now it properly redirects to error page when
api service is down.

app/coffee/app.coffee

@@ -141,6 +141,7 @@ configure = ($routeProvider, $locationProvider, $httpProvider, $provide, tgLoade
             return promise.then null, (response) ->
                 if response.status == 0
                     $location.path($navUrls.resolve("error"))
+                    $location.replace()
                 else if response.status == 401
                     nextPath = $location.path()
                     $location.url($navUrls.resolve("login")).search("next=#{nextPath}")

app/coffee/modules/base.coffee

@@ -44,6 +44,7 @@ module.directive("tgMain", ["$rootScope", "$window", TaigaMainDirective])
 
 urls = {
     "home": "/"
+    "error": "/error"
     "login": "/login"
     "forgot-password": "/forgot-password"
     "change-password": "/change-password/:token"