[geary] (12 commits) Created branch wip/730682-refine-convo-list

[Michael Gratton <mjog src gnome org>]

The branch 'wip/730682-refine-convo-list' was created.

Summary of new commits:

  b767fa9... Initial implementation of refined conversation list ux.
  1d1316f... Bind some Configuration props so they can be listened to us
  7ea64e7... Update conversation list items when the underlying conversa
  8884977... Update the model when conversations are added and removed.
  c2f09f0... Set the conversation list's scrolled window policy in the b
  c4b662c... Hook up selection/activation handling for new conversation 
  3d45f5c... Minor code clean up.
  d1c1a4a... Manage changing conversation counts from MainWindow, not Ge
  c1365b4... Re-implement conversation lazy loading on scroll.
  954afd0... Increase initial conversation load to make initial scroll l
  9c41ee7... Simple, inefficient preview loader implementation.
  ff21b9f... Very incomplete visible conversations implementation.