Updated template for unity-lens-video: new strings to translate

[Sebastien Bacher]

Hey everyone,

I'm looking a bit at https://launchpad.net/bugs/1074038 
(broken/untranslatable strings in the dash previews).

I noticed that the unity-lens-video template was incomplete (missing 
file in POTFILES.in), a new one has been uploaded which leads to a few 
new strings to translate on:
https://translations.launchpad.net/ubuntu/raring/+source/unity-lens-video

You can see those if you go to the dash, video lens, and right click on 
an online video

Cheers,
Sebastien Bacher