[gtk] (2 commits) Non-fast-forward update to branch wip/baedert/for-master

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/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:

  a3e9ec5... widget: Only do a IS_ROOT type check if the parent is unset

Commits added to the branch:

  6e32388... widget: Only do a IS_ROOT type check if the parent is unset
  4106922... widget: Save controllers list in a GPtrArray