feat(playlists): merge sync with RP

pkg/api/playlist.go

@@ -180,6 +180,7 @@ func CreatePlaylist(c *middleware.Context, cmd m.CreatePlaylistCommand) Response
 
 func UpdatePlaylist(c *middleware.Context, cmd m.UpdatePlaylistCommand) Response {
 	cmd.OrgId = c.OrgId
+
 	if err := bus.Dispatch(&cmd); err != nil {
 		return ApiError(500, "Failed to save playlist", err)
 	}

public/app/features/playlist/playlist_srv.ts

@@ -17,7 +17,9 @@ class PlaylistSrv {
   next() {
     this.$timeout.cancel(this.cancelPromise);
 
-    if (this.index > this.dashboards.length - 1) {
+    var playedAllDashboards = this.index > this.dashboards.length - 1;
+
+    if (playedAllDashboards) {
       this.start(this.playlistId);
     } else {
       var dash = this.dashboards[this.index];