Code review comment for lp:~adiroiban/launchpad/bug-492375

= Bug 492375 =
Suppose I want to translate Ubuntu into Romanian.
I will go to: https://translations.edge.launchpad.net/ and click on "Ubuntu Karmic (9.10)"
The next page will be :
https://translations.edge.launchpad.net/ubuntu/karmic/+translations
Then I have to scroll all along the page and search for Romanian in that big and compact list.

== Proposed fix ==
At first page load, only display users preferred languages and display a link for viewing all languages.

Just like we do for source packages:
https://translations.launchpad.net/ubuntu/karmic/+source/gfxboot-theme-ubuntu/

== Pre-implementation notes ==

After a long chat with Danilo and Jeroen we decided it is best to put the class selection login in the template with some help from the view.

== Tests ==

bin/test --layer=TranslationsWindmillLayer -D -t serieslanguages

UI Review screenshots:
 * http://launchpadlibrarian.net/36485928/preferred.png
 * http://launchpadlibrarian.net/36485936/all-languages.png

== Demo and Q/A ==

Access one of the page presenting language series.
For example http://translations.launchpad.dev/ubuntu

If you are not logged in, you will see a list of languages obtained using geoip.
You can click the "View all languages" and the table should display all langauges for Ubuntu.

If you are logged in, it will show only your preferred languages.