[gtk] (6 commits) Non-fast-forward update to branch columnview-scrolling

[Matthias Clasen <matthiasc src gnome org>]

The branch 'columnview-scrolling' 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:

  c6dec11... More action tests
  f54f01f... columnview: Revise scroll-minimum handling
  1bdccbe... columnview: Implement horizontal scrolling

Commits added to the branch:

  1995ad6... Add a forgotten export (*)
  af65b7e... More action tests (*)
  f89a1b0... Merge branch 'matthiasc/for-master' into 'master' (*)
  ed02bea... Merge branch 'action-tests' into 'master' (*)
  5a666d0... columnview: Revise scroll-minimum handling (*)
  55b4ad5... columnview: Implement horizontal scrolling (*)

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