[pitivi] (10 commits) ...Merging translations

[Edward Hervey <edwardrv src gnome org>]

Summary of changes:

  714e53d... seeker: cosmetic change
  0fbcd7d... discoverer: also query the duration once caps are fixed.
  d4b3fc5... ui/timeline.py: remove duplicated code which connects DnD s
  b670985... factories/base.py: fix bug preventing scaling when project 
  d630a1a... tests/common.py: don't bother checking for leaks if test ca
  4311ab7... test_factories_file.py: check in unit test for SourceFactor
  023931a... Block video pads to prepare for seeking only once they are 
  2593f5e... Add more video frame rates. Fixes #603203.
  6beecf5... Set a default size for the detachable source list window.
  a599262... Merging translations