[gtk] (5 commits) Non-fast-forward update to branch matthiasc/for-master

[Matthias Clasen <matthiasc src gnome org>]

The branch 'matthiasc/for-master' 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:

  e3c4471... wayland: Fix dnd action handling
  ab197fa... wayland: Minor cleanup
  b798dbc... docs: Small clarifications to DND docs

Commits added to the branch:

  8c77491... wayland: Fix action handling more (*)
  6cef520... wayland: Minor cleanup (*)
  814d20d... docs: Small clarifications to DND docs (*)
  74c07b0... wayland: Remove debug spew
  3ca33fa... widget: Remove an unused signal

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