[gtk] (4 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:

  8ad4ee1... GskTransform: add assertions to make normalize_angle() inte
  3acb25d... GskTransform: Remove useless fmod check
  272102e... style context: Remove parent relationship
  a220112... widget: Create style context in _init

Commits added to the branch:

  e37fccc... GskTransform: add assertions to make normalize_angle() inte
  7d59195... GskTransform: Remove useless fmod check
  4864264... style context: Remove parent relationship
  1741db6... widget: Create style context in _init