[gtk] Non-fast-forward update to branch scrollable_parents_have_precedence

[Nelson Ben <nbenitez src gnome org>]

The branch 'scrollable_parents_have_precedence' 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:

  1f4cdf1... containers that can be scrolled should have precedence

Commits added to the branch:

  44ce951... scrolling a container should not scroll child widgets