[gtk+] (12 commits) Created branch toplevel-embedding

[Tristan Van Berkom <tvb src gnome org>]

The branch 'toplevel-embedding' was created.

Summary of new commits:

  0cc3789... Allow GtkWindow to be parented if gtk_widget_set_parent_win
  f1ddc42... Added docs to gtk_widget_set_parent_window.
  bea930c... Slightly less special casing in GtkWindow for gtk_widget_is
  89928f9... Added tests/testtoplevelembed.
  bff453c... Fixed issues with "hierarchy-changed" signal.
  17e24a5... Moved location of unsetting parent window inside gtk_widget
  c3ad201... Added buttons to notebook tabs in testtoplevelembed
  7e564ce... Fixed focus handling on embedded windows.
  f62f13c... Fixed GtkWindow/GtkWidget to properly emit hierarchy change
  7cd20c3... Fixed GtkFileChooserDefault to handle cases of being in an 
  b2d7744... Changes to testtoplevelembed
  b3eb29d... Fixed conflict while rebasing master.