dashboards: add new default frontend route for rendering a dashboard panel

New default route /d-solo/<uid>/<slug of dashboard title> where dashboard
panel are rendered by unique identifier and panel identifier.
If old route /dashboard-solo/db/<slug of dashboard tile> are used,
try to lookup dashboard by slug and redirect to new default route.
Change url logic for sharing a panel so that the new default route
for rendering a dashboard panel are used.
 #7883

public/app/routes/routes.ts

@@ -26,6 +26,12 @@ export function setupAngularRoutes($routeProvider, $locationProvider) {
       reloadOnSearch: false,
       pageClass: 'page-dashboard',
     })
+    .when('/d-solo/:uid/:slug', {
+      templateUrl: 'public/app/features/panel/partials/soloPanel.html',
+      controller: 'SoloPanelCtrl',
+      reloadOnSearch: false,
+      pageClass: 'page-dashboard',
+    })
     .when('/dashboard-solo/:type/:slug', {
       templateUrl: 'public/app/features/panel/partials/soloPanel.html',
       controller: 'SoloPanelCtrl',