[gtk] (15 commits) ...Merge branch 'listview-dnd' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  e8ba16d... listbase: separate autoscroll from rubberband (*)
  4e56581... listbase: Autoscroll during DND (*)
  c659a23... listbase: Increase the autoscroll threshold (*)
  02b293b... listbase: Don't use adjustments for autoscrolling (*)
  b299d62... columnview: separate autoscroll from headers (*)
  470a1aa... columnview: Autoscroll during DND (*)
  110c316... columnview: Increase the autoscroll threshold (*)
  5629ac3... Add a list dnd example (*)
  9555e61... treeexpander: Auto-expand during DND (*)
  f054c31... expander: Remove a pointless return (*)
  6280066... testlistdnd: Add a tree (*)
  290611f... editablelabel: Accept text drops (*)
  8511f25... editablelabel: Allow to drag text (*)
  17af979... testlistdnd: Use editable labels (*)
  395d404... Merge branch 'listview-dnd' into 'master'

(*) This commit already existed in another branch; no separate mail sent