= Series language pages =

DistroSeriesLanguage and ProductSeriesLanguage pages have several common properties: 
 
  1. They display a list of all POFiles in a particular context (i.e. DistroSeries or ProductSeries) for a single language.
  2. Their contexts implement IHasTranslationTemplates and IRosettaStats

We should:

  1. Migrate them to 3.0 templates ([[https://bugs.edge.launchpad.net/rosetta/+bug/423836|#423836]])
  2. Introduce IHasTranslationFiles interface and abstract implementation which works well for both, make DSL and PSL use that
  3. Introduce cross-batch sorting into these (sort over multiple batches if there's more than meets the eye)
  4. Implement the same interfaces/templates for source packages
  5. Implement the same interfaces/templates for projects