dashboards: make scripted dashboards work using the old legacy urls

Scripted dashboards are still requested from /dashboard/script/scripted.js
#7883

public/app/routes/dashboard_loaders.ts

@@ -19,7 +19,7 @@ export class LoadDashboardCtrl {
     }
 
     // if no uid, redirect to new route based on slug
-    if (!$routeParams.uid) {
+    if (!($routeParams.type === 'script' || $routeParams.type === 'snapshot') && !$routeParams.uid) {
       backendSrv.get(`/api/dashboards/db/${$routeParams.slug}`).then(res => {
         if (res) {
           $location.path(res.meta.url);