David Robillard <d@drobilla.net>

Contributors:

 * Devin Anderson <surfacepatterns@gmail.com>
   * Fix reparenting of Gtk UIs in Qt
 * Peter Nelson <peter@fuzzle.org>
   * Fix crash when a broken UI returns a NULL descriptor
 * Filipe Lopes <falktx@gmail.com>
   * Idle interface fixes for X11 in Qt4