[gtk] (6 commits) Non-fast-forward update to branch dnd-gestures-2

[Matthias Clasen <matthiasc src gnome org>]

The branch 'dnd-gestures-2' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  94b4a1a... testnotebookdnd: Fix, partially
  dd4af24... testtreednd: Convert to GtkDropTarget
  71d0f15... notebook: Convert to GtkDropTarget
  c74d60c... listbox: Remove unhighlighting
  ba56ffc... Move some remaining api over
  c1be236... Remove old drag dest api

Commits added to the branch:

  68ffa5a... testnotebookdnd: Fix, partially
  d63559e... testtreednd: Convert to GtkDropTarget
  20325bb... notebook: Convert to GtkDropTarget
  ee22be7... listbox: Remove unhighlighting
  9d4f039... Move some remaining api over
  ad7f9e6... Remove old drag dest api