[gtk] (10 commits) Non-fast-forward update to branch wip/otte/dnd

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/dnd' 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:

  64cfcaa... dnd: simplify code
  376b648... dragdest: Simplify function
  f1c2b3b... colorbutton, colorswatch: Simplify DND
  1ef8932... dragdest: Make gtk_drop_target_new() args be transfer full

Commits added to the branch:

  e1f8c14... dnd: simplify code
  3a7e3cf... dragdest: Simplify function
  91d91a2... colorbutton, colorswatch: Simplify DND
  80ba7fd... dragdest: Make gtk_drop_target_new() args be transfer full
  f5e3584... placessidebar: Don't claim to support text dnd
  b927755... contentprovider: Add a union content provider
  a5a86f3... dragdest: Handle NULL content formats everywhere
  73b609f... notebook: Move dnd scrolling via arrows to own drop target
  488449d... notebook: Use proper DND
  cdce402... placessidebar: Modernize DND