[gtk] (14 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:

  6c5e04c... textview: Remove unnecessary drag highlighting
  df1279a... calendar: Remove drag highlighting calls
  8fd4702... listbox: Stop using gtk_drag_(un)highlight
  3205aa7... calendar: fixup
  e244f69... text view: fixup
  e986f1e... filechooser: Remove code for sidebar pre-arming
  538f932... Drop gtk_drag_(un)highlight
  adf1549... Add GdkDrop back to signal signatures
  8eaa736... Update all callers
  ca73418... baby steps
  a51a9c3... Add another dnd testcase

Commits added to the branch:

  043b382... textview: Remove unnecessary drag highlighting
  a5e6827... calendar: Remove drag highlighting calls
  87c8e1b... listbox: Stop using gtk_drag_(un)highlight
  dc26235... filechooser: Remove code for sidebar pre-arming
  500ee35... Drop gtk_drag_(un)highlight
  6c3403c... Add GdkDrop back to signal signatures
  89495d6... Update all callers
  6853857... Add another dnd testcase
  449b025... dragdest: Steps towards allowing nested drop sites
  71981c4... content provider impl: Take mime types into account
  b8a37b8... testdnd2: Fix the text case
  ee83b6c... dragdest: Add a ::drag-enter signal
  51a89fc... remove debug spew
  ab7dff9... dragdest: Allow denying drops asynchronously