Thumbnails are not rotated when video and poster are.

[xbgmsharp]

The thumbnails are not rotate when video and poster are.
You can reproduce the issue.

• Take a portrait video.
• Import in PWG and sync.
• Enable rotation videojs plugin
• go the video page, you see the video is rotate as expected as well as the poster.

[xbgmsharp]

Fix committed via bc2cd70